Explorez tous les épisodes du podcast One Health Tweak a Week Podcast

Beans and lentils have one of the strongest reputations in healthy eating. But how much difference do they actually make to long-term health?

In this episode, we look at the evidence linking higher legume intake with a lower risk of premature death, including statistical models suggesting that relatively modest reductions in risk could add up over decades. We also examine the cardiovascular evidence, which is more mixed than you might expect, and the more consistent effects on LDL cholesterol and other metabolic markers.

The most interesting part of the story, though, may be what legumes replace. Studies suggest that swapping some red or processed meat, or eggs, for beans, lentils or chickpeas could offer greater benefits than simply adding legumes to your existing diet. We’ll look at why, and whether you can make those swaps without sacrificing protein.

We also tackle two of the main reasons people hesitate to eat more legumes: concerns about so-called “anti-nutrients” and the fear of digestive discomfort. Most of those worries are overblown, although there are a few important preparation rules worth knowing.

The practical goal: work towards roughly 100g of cooked legumes a day, mainly by using them as a replacement food.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

Choosing a protein supplement shouldn’t be complicated, but the shelves suggest otherwise. Whey concentrate, isolate, hydrolysate, pea, soy, rice, blends, collagen, mass gainers, added sweeteners, sodium, heavy metals - it’s easy to lose sight of what actually matters.

In this episode, we break down the choices and show which differences are meaningful and which are mostly marketing.

We’ll look at why whey concentrate is usually the simplest dairy option, when whey isolate makes sense, and why plant proteins can work perfectly well despite the familiar claim that they’re “incomplete”. We’ll also look at leucine, why it matters more as we age, and how much protein powder you may actually need once you take the protein already in your meal into account.

We also cover what to look for on the label, including sodium, artificial sweeteners and unnecessary additives, plus the recent concerns about lead, cadmium and other heavy metals in protein powders.

The aim is simple: to help you choose a protein supplement that fits your needs, without paying for marketing you don’t need - and without taking more powder than is useful.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

Can eating lots of ultra-processed food make your body age faster?

Several recent studies suggest it might. Across large US, UK and Italian datasets, people eating the most ultra-processed food tended to have biological-age profiles several months older than those eating the least.

In this episode, we look at what “biological age” actually means, how researchers estimate it using blood biomarkers, DNA methylation and telomere length, and why these measures are useful without being precise personal clocks.

We’ll then work through the strongest studies, including one involving more than 16,000 US adults in which each additional 10% of daily energy from ultra-processed food was associated with 0.21 extra biological years.

We’ll also explore what may be driving the association. Excess body fat appears to explain roughly a quarter to a third of the effect, while poorer diet quality accounts for only part of the remainder. Other possibilities, including inflammation, altered food structure, microbiome changes and chemicals from processing or packaging, remain plausible but unproven.

This isn’t an argument for dietary purity. The practical question is which ultra-processed foods you eat most often, and which of those would be easiest to replace.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Last time, we looked at the complicated evidence around whole eggs and long-term health. This week, the obvious question is: what should you eat instead?

In this episode, we move beyond generic lists of “healthy alternatives” and look at the different jobs eggs perform in real life. They’re quick, warm, savoury, satisfying and a convenient source of protein. Any useful replacement needs to account for that.

We start with the lowest-friction option: keeping egg-based meals but using fewer yolks and more whites. From there, we look at substitution studies comparing eggs with nuts, legumes, whole grains, fish, poultry, and lower-fat dairy, and why some of these swaps are associated with lower risks of premature death, cardiovascular disease, and type 2 diabetes.

We also cover the less helpful replacements. Swapping eggs for processed meat, red meat or full-fat dairy may move risk in the wrong direction.

Finally, we tackle the protein question. You don’t need one ingredient to reproduce everything an egg provides. Protein adds up across the meal, whether that’s yoghurt with nuts and seeds, beans with whole grains, tofu with edamame, or one whole egg with extra whites.

The aim is to find meals that are practical, satisfying and genuinely worth looking forward to.

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Are eggs good for you, or are they harmful? It sounds like a straightforward question. Unfortunately, the evidence refuses to give us one straightforward answer.

In this episode, we look at why the health effects of eggs depend on far more than whether you eat them at all. How many do you eat - one occasionally or several every morning? Do you eat the whole egg or mostly the whites? Are they boiled or fried? Do they arrive with vegetables and wholegrain toast, or with bacon, sausages and butter?

Your wider diet matters too. So do your age, cholesterol response and metabolic health; whether you have diabetes or cardiovascular disease; and even where in the world you live. These differences help explain why some large studies appear reassuring while others link regular egg consumption with greater cardiovascular and mortality risk.

We separate what eggs genuinely offer from what their yolks bring with them, examine why dietary cholesterol never became irrelevant, and ask whether reassuring averages can conceal the risk to an individual listener.

The useful answer lies beyond “eggs are healthy” or “eggs are harmful”. We work through the evidence and arrive at a practical way to decide how often whole eggs belong in your own diet - without turning breakfast into a nutritional battlefield.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

Protein advice has become very focused on one question: are you getting enough?

That matters, especially in midlife and later life, when maintaining muscle, strength and independence becomes increasingly important. But there’s another question that gets far less attention: where is that protein coming from?

In this episode of One Health Tweak a Week, we look at the evidence behind the 18g protein swap: replacing roughly one daily serving of animal protein with plant protein. Across several large, long-running studies, that kind of shift is linked with a lower risk of dying prematurely, especially when plant proteins replace processed meat, red meat and egg-heavy meals.

This isn’t an argument for going vegan, and it isn’t anti-protein advice. For older adults, getting enough protein remains a priority. For younger adults, the message is a little different: don’t necessarily chase ever-higher protein targets, but do pay attention to the mix.

We’ll look at why the protein source matters, which swaps offer the greatest likely benefit, and how to add more beans, lentils, chickpeas, tofu, soy foods, nuts, seeds, and whole grains without accidentally cutting your protein intake.

The upgrade is simple: eat a better protein pattern

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

This week’s One Health Tweak a Week podcast looks at why a healthy grocery trip so often comes home with a few extra foods that were never on the list.

Following Helen, a sensible midlife shopper trying to buy food for a reasonably healthy week, we explore how grocery stores quietly reshape what we notice, reach for and justify. The episode looks at oversized shopping carts, fresh produce at the entrance, bakery smells, scattered essentials, aisle-end “specials”, free samples, bulk deals and health-halo packaging that makes ultra-processed snacks look like acts of self-care.

The point isn’t that shoppers are gullible, or that one packet of muffins or family bag of chips ruins anyone’s health. It’s that the foods we bring home become the choices available to our tired, hungry, busy future selves. The grocery store changes what we buy today; our cupboards change what we eat for the rest of the week.

You’ll also hear practical ways to shop more consciously without becoming joyless about it: write a real list, choose the right basket or cart, plan treats rather than collecting ambush treats, treat aisle-end offers as adverts, question health-halo claims, and avoid bulk-buying foods you don’t want to eat in bulk.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

Plant-based meat alternatives have come a long way from the worthy-but-woolly veggie sausages of the 1990s. Today’s burgers, sausages, mince and nuggets can look, sizzle and chew remarkably like meat. But does that make them a healthier choice, or just a more convincing ultra-processed food?

In this episode, we’ll explain why “plant-based” is too broad a label to trust on its own. We’ll separate genuinely health-supportive plant proteins, such as beans, lentils, tofu and tempeh, from ultra-processed meat mimics designed to replicate the eating experience of burgers, sausages and nuggets.

We’ll look at what short-term trials show when people replace meat with plant-based meat, including the encouraging signals for LDL cholesterol, fibre intake and body weight. Then we’ll step back and ask the bigger question: do those short-term improvements prove long-term health benefit?

Most importantly, we’ll show why the real comparator matters. A plant-based sausage replacing a pork sausage may be a useful step. A plant-based sausage replacing lentils, fish, tofu or a minimally processed meal probably isn’t.

By the end, you’ll have a simple rule: judge the swap, not the slogan.

Do you really need to find the “best” fruit, or is ordinary fruit already doing most of the work?

In this episode of One Health Tweak a Week, we look at the anxiety created by health blogs, Instagram “super-berries”, and nutrient rankings, then ask a more useful question: how can you get the greatest benefit from the fruit habit without turning it into homework?

We start with the bigger evidence: fruit is strongly linked with healthy ageing and lower all-cause mortality, with around two handfuls a day appearing to be a meaningful target. Then we test the idea of a single “best” fruit by comparing fruits for fibre, vitamin C, polyphenols, potassium, vitamin A, and lower-calorie volume.

The answer is reassuring: different fruits do different jobs. Berries shine for fibre and polyphenols. Citrus, kiwi, strawberries and tropical fruits bring vitamin C. Dark fruits add polyphenol depth. Apples, pears, bananas and frozen fruit keep the habit practical. Dried fruit can help, but it works best as a small addition rather than something to graze from the bag.

The tweak: build a weekly fruit spectrum, not a fruit ranking chart.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

Protein supplements are usually marketed at gym-goers, bodybuilders and people chasing bigger muscles. But the people who may benefit most are often the ones least likely to think about using them: older adults, plant-based eaters, people trying to lose weight without losing muscle, and those recovering from illness, surgery or hospitalisation.

In this episode of One Health Tweak a Week, we look at a more useful question than “Do protein shakes work?”: Are your meals actually giving your muscles enough protein?

You’ll learn why protein needs often rise from our sixties onwards, why appetite and food volume can make those targets harder to reach, and why breakfast is often the meal where the biggest gap quietly appears. We also explain when protein powder can be a sensible top-up, why it shouldn’t replace proper meals, and why “high-protein” snack foods are not the same thing as a useful supplement.

The episode also covers plant-based diets, calorie restriction, recovery after illness, and the essential role of resistance exercise.

By the end, you’ll have a simple way to audit your breakfast, spot a real protein shortfall, and decide whether food alone is enough or whether a simple supplement might help close the gap.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

n this week’s One Health Tweak a Week podcast, we’re looking at the form of exercise many health-conscious people still quietly avoid: strength training.

A couple of months ago, we talked about why resistance exercise matters for preserving muscle, function, and independence as we age. This episode comes at it from a different angle: not just whether strength exercise helps you stay stronger, but whether it’s linked with living longer.

We’ll unpack a just-published 30-year study of more than 147,000 US adults, which found that regular resistance exercise was associated with lower risks of death from any cause, cardiovascular disease, and neurological disease. We’ll also look at how the findings fit with previous meta-analyses, why the apparent sweet spot is surprisingly modest, and why more than about 2 hours a week does not seem to add extra longevity benefit.

Most importantly, this isn’t a “become a gym person” episode. We’ll talk about why walking, cycling, gardening, and other aerobic activities still matter enormously, but may not cover everything your body needs.

You’ll come away with a practical target: keep your aerobic base, then add 2 or 3 short strength sessions a week using simple, everyday movements you can do at home.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

This week’s One Health Tweak a Week podcast is about processed meat: not just bacon, sausages and hot dogs, but the everyday foods that quietly creep into otherwise healthy diets.

We’ll look at why processed meat is not simply “meat with a bit of salt,” and why regular intake has been linked with higher risks of colorectal cancer, type 2 diabetes, cardiovascular disease, stroke, heart failure and premature death. We’ll also unpack what actually counts as processed meat, including ham, salami, pepperoni, deli slices, chicken nuggets, many burgers, turkey bacon and “uncured” or “naturally cured” products.

This isn’t an episode about food guilt or pretending bacon isn’t delicious. It starts with the full English breakfast for a reason. The real question is frequency: are these foods occasional pleasures, or have they become your default protein?

You’ll hear why celery powder and “natural nitrates” are not the escape hatch they appear to be, why white-meat versions aren’t clearly safer, and how processing, curing, smoking and high-temperature cooking change the health profile of meat.

The takeaway is simple: keep the processed meats you genuinely love, savour them occasionally, and replace the forgettable routine servings with easier, less processed protein most of the time.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

This week’s episode is about one of the most overlooked signals shaping your sleep, mood, energy and long-term health: light.

Most advice starts at the wrong end of the day. We’re told to stop scrolling before bed, switch on night mode, or buy blue-light glasses. Those things can matter, but they miss the bigger pattern. Modern life has flattened the rhythm our bodies evolved to expect: bright days, fading evenings and dark nights.

Many of us now spend our days indoors in light that feels bright, but is biologically dim. Then, just as the body should be winding down, we switch on ceiling lights, kitchens, televisions, laptops and phones. Finally, we sleep in bedrooms that often aren’t truly dark.

In other words, we live in biological twilight.

In this episode, we explain why light isn’t just something that helps you see. It is one of the body’s strongest timing cues, helping your brain, hormones, metabolism and sleep machinery understand when day begins and night has arrived.

You’ll learn why cloudy outdoor daylight still matters, why night mode only partly helps, why blue-light glasses are not the main answer, and how small changes to your morning, evening and bedroom light can give your body a clearer daily rhythm.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

This week, we’re tackling one of the most common reasons people hold back from eating more fruit: sugar.

Fruit is sweet. Fruit contains sugar. And if you’re trying to cut back on sugar, it’s easy to wonder whether apples, oranges, berries, grapes and pears should be on the “be careful” list.

But whole fruit is not sugar in disguise.

In this episode, we explain why “contains sugar” is not the same as “behaves like sugar”, and why whole fruit sits in a very different category from fizzy drinks, fruit juice, cakes, biscuits, sweets, sweetened coffees and many commercial smoothies.

We’ll look at the evidence linking around 200g / 7oz / two handfuls of whole fruit a day with better long-term health, including healthier ageing, lower cardiovascular risk and lower type 2 diabetes risk. We’ll also unpack why fruit sugar behaves differently: chewing, fibre, water, intact plant cells, fullness, and the wider food matrix all matter.

We’ll cover the fructose confusion too, including why the concerns around high-fructose corn syrup and sugary drinks shouldn’t be transferred wholesale to the fruit bowl.

The practical takeaway: don’t start cutting sugar by cutting whole fruit. Start with liquid and refined sugar, and let fruit become your default sweet food.

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In this episode of One Health Tweak a Week, we look at why time in nature deserves a place alongside food, exercise and sleep as a practical health input.

Green space is often treated as a pleasant extra: a weekend walk, a holiday view, a nice background for a phone photo. But studies link regular exposure to nature with lower stress, better mood, improved sleep, lower blood pressure, better self-rated health, and lower risks of type 2 diabetes, cardiovascular death and premature death.

The most useful part is how achievable this is. You don’t need a national park, a rural postcode, or a personality transplant into someone who owns expensive waterproof trousers. Parks, tree-lined streets, gardens, canals, rivers, coastlines, window views, birdsong and nature videos can all contribute in different ways.

We’ll also look at dose. The useful amount may be smaller than you think: 10–30 minutes can matter, the first 30 minutes per week may deliver a meaningful share of the mental-health benefit, and frequent small doses may be better than saving nature for one occasional heroic hike.

This week’s tweak is simple: add more ordinary nature to your week. Trees, if you can. Water if it’s nearby. Birdsong as a bonus. No hiking boots required.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Most protein advice focuses on how much you eat. Sometimes it talks about protein quality. But there’s a third question we rarely discuss: when should you eat it?

In this week’s episode of One Health Tweak a Week, we look at how protein timing changes the way your muscles respond, especially from midlife onwards. The key idea is simple: your muscles don’t benefit much from a constant trickle of tiny protein snacks. They respond better to clear, meaningful protein doses spread across the day.

We’ll look at why breakfast may be the most overlooked protein opportunity, why older muscles often need a stronger signal to switch on muscle-building, and why saving most of your protein for dinner may not be the smartest pattern if you’re trying to stay strong as you age.

We’ll also tackle the overhyped post-workout “anabolic window”, where bedtime casein might fit, and how intermittent fasting can be adjusted to better protect muscle.

The goal isn’t to turn eating into a spreadsheet or make everyone live on protein shakes. It’s to help you build a protein day your muscles can actually use: enough total protein, regular strength exercise, and a few well-timed protein pulses starting with breakfast.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

This week’s One Health Tweak a Week podcast tackles a frustrating problem many of us recognise: you try to eat better, cut back on the obvious offenders, and yet your waistline still refuses to budge.

The reason may be that belly fat, especially the visceral fat around your organs, is not just a food story. In this episode, we look at the overlooked non-food factors that can quietly drive abdominal fat upwards, including poor or irregular sleep, chronic stress, low mood, loneliness, inactivity, menopause, sleep apnoea, and some medications.

We also explore why visceral fat matters for far more than appearance. Higher levels are linked to insulin resistance, type 2 diabetes, fatty liver disease, heart disease, and a shorter healthy lifespan.

You’ll hear why the sweet spot for sleep seems to be around 7.5-8 hours, how fragmented or erratic sleep may work against you, why stress and low mood can become metabolic problems, and why a stubborn waistline is sometimes asking for a wider health audit rather than a stricter diet.

If you’ve been doing the sensible things and wondering why your middle still is not cooperating, this episode should help you think about the problem more clearly, and more usefully.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this week’s episode, we’re talking about a small shift that could help you stay slimmer, sleep better, reduce reflux, improve your blood sugar, and possibly even support a longer, healthier life.

Most of us think meal timing is a minor detail. We focus on what we eat, while barely noticing that dinner has become the biggest meal of the day and is landing later and later. But the research suggests that this matters much more than most people realise.

In this episode, we’ll show you why your body handles food differently depending on the time of day, why the same calories can have different effects when eaten early rather than late, and why breakfast, dinner timing, and intermittent fasting are really all part of the same circadian story.

We’ll also cover the practical pattern that seems to work best: a real breakfast, more of your calories earlier in the day, and a lighter, earlier dinner. And because real life isn’t designed around perfect biology, we’ll talk about what this means if you’re a night owl, a shift worker, or someone whose evenings always seem to run away with them.

If dinner has quietly become the main event in your day, this episode may explain why that’s not great - and what to do about it.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this week’s episode, we look at one of the most underestimated foods for long-term brain health: fruit.

Most of us think of fruit as vaguely healthy, useful for vitamins and fibre, but not especially strategic. The research tells a different story. Eating about 200g of whole fruit a day is linked to lower risks of stroke, dementia, depression, and cognitive decline, and much of the benefit seems to arrive by that level.

In the episode, we walk through the evidence behind that 200g target, including what large studies have found about fruit and dementia risk, why berries and other flavonoid-rich fruits stand out, and why whole fruit beats juice. We also cover fruit and mood, the difference between fresh, frozen, juiced, dried, and blended fruit, and how to build a simple fruit habit that doesn’t end with a guilty trip to the compost heap.

This isn’t about eating heroic quantities or buying exotic superfoods. It’s about a straightforward daily habit that can do a great deal for your brain, your mood, and your future health.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this week’s episode, we’re talking about a protein problem that gets far less attention than it should: as we get older, it’s not enough to get “some protein somewhere” across the day and assume that will take care of our muscles.

We tend to think about frailty as something vague and inevitable. It isn’t. Frailty steals strength, balance, confidence, and independence, and often starts earlier than people realise. One reason is that ageing muscle becomes less responsive to protein, just as appetite often begins to shrink.

In this episode, we explain the three protein ideas that are easy to muddle together: your daily protein target, how much protein a meal needs to actually count for muscle maintenance, and why leucine matters as part of that signal. We also look at why breakfast is often the meal most worth fixing, why front-loading protein earlier in the day makes sense, and why many older adults are probably underdoing protein without knowing it.

This isn’t about bodybuilding or influencer-level protein obsession. It’s about staying strong, steady, and independent for longer.

If you’re in midlife or beyond, this episode will help you think more clearly about what your muscles need now. And if you’re younger, there’s a good chance it will make you think differently about someone you love.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this week’s episode, we’re looking at what really matters if you want to stay strong as you get older - and it’s not the number on a body-composition scan.

We hear a lot about protein, lean mass, and the need to optimise everything. But when it comes to healthy ageing, the more important question is whether you’re staying strong and physically capable. Measures like grip strength and walking speed tell us far more about later-life health and independence than a printout telling you how much lean tissue you have.

We talk through what the research shows about muscle loss with age, why strength tends to decline faster than muscle mass, and why that matters for things like mobility, balance, falls, and staying independent. I also explain why walking, good as it is, doesn’t replace resistance exercise if you want to keep your muscles doing their job.

Protein still matters, especially as you get older, but it comes second. Muscles need a reason to stay, and that reason is regular strength-building work.

So this episode is really about getting the priorities straight: less obsession with body-composition numbers, more focus on staying strong, steady, and useful in everyday life.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this week’s episode, we’re talking about visceral fat - the fat packed around your abdominal organs that is much more strongly linked than ordinary body fat to insulin resistance, worse cholesterol patterns, type 2 diabetes, and long-term cardiometabolic risk.

Most people assume the best way to reduce belly fat is to diet harder. But when you look specifically at visceral fat, the evidence points in a different direction. Large reviews suggest that exercise is more effective than calorie restriction for reducing this dangerous fat, even when dieting leads to more overall weight loss.

We’ll look at why the scale can be misleading here, why you can lose visceral fat while your weight barely changes, and why that matters.

We’ll also walk through the evidence showing that the more energy you expend through exercise, the more visceral fat you’re likely to lose, and why vigorous aerobic exercise and HIIT appear to work best.

This is also a realistic episode. We’ll talk about what “enough” exercise actually looks like in practice, why a few gentle strolls usually won’t make much difference to visceral fat, and why resistance training still matters even if it isn’t the strongest standalone tool for this specific goal.

If you’ve ever felt frustrated that your waistline and your scales don’t seem to agree, this episode should help you think about the problem more clearly - and give you a more useful plan for what to do next.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this episode, we explore a question that turns out to be much bigger than sleep alone: what happens when your body clock starts to drift?

The starting point is deceptively small. Over the past couple of months, my bedtime slipped by around 45 minutes. On paper, that sounds trivial. In practice, it brought early waking, rougher mornings, and that slightly wired, slightly frayed feeling that suggests something deeper is off. And that is the heart of this episode: the idea that functioning is not the same as being in sync.

We often treat poor sleep, late-night screen use, caffeine reliance, rough mornings, and drifting routines as separate problems. But what if they are really clues that the underlying timing system beneath them - your circadian rhythm - is getting blurrier signals than it should?

We unpack what circadian rhythm actually is, why regular timing matters for more than just sleep, and what the research says about rhythm stability and long-term health. We also look at the practical side: morning light, consistent wake times, meal timing, evening boundaries, and the small daily cues that help your body know when day begins and night ends.

If your routines have been quietly drifting later, this episode will help you spot the signs - and tighten one slipping rhythm before your body accepts it as normal.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

If you’ve ever looked at a bowl of grapes and thought, “This is basically sweets in disguise”, this episode is for you.

This week, we tackle a surprisingly anxious question: does eating fruit every day quietly sabotage your weight and waistline - or can it actually help?

We’ll walk through what large, long-term studies really show: people who eat around 200 g / 7oz of whole fruit a day - roughly two decent handfuls - tend to gain less weight over time, are less likely to become overweight or obese, and usually have slightly slimmer waists than those who rarely touch fruit.

Then we get into the why. Not magic fat-burning, but how whole fruit behaves in your body: water, fibre and intact cell structure slow sugar absorption, increase fullness, and make fruit far more likely to displace savoury snacks, biscuits, desserts and sugary drinks than to add on top. We’ll also unpack why juice and smoothies behave much more like soft drinks, and where they fit (or don’t) if you’re watching your weight.

Finally, we’ll give you a simple, no-drama rule of thumb: how to use a “double handful” of fruit most days to support your long-term health and weight, without calorie-counting or fear of fruit sugar.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

If you’re going to spend money on extra-virgin olive oil, it’s worth making sure you’re not just buying a story on the label.

In this episode, we move from why EVOO is such a good health bet to how to actually choose, store, and use it so you’re more likely to get the benefits the studies point to.

We’ll look at why “extra-virgin” is a legal grade, not a health guarantee, and why polyphenols are the real stars. We’ll walk you through the simple signals that tilt you towards a higher-polyphenol bottle without needing lab tests: harvest date, country or region, single-estate and early-harvest clues, and even that peppery throat “bite”.

Then we get practical about packaging and storage: why dark glass in a cool cupboard matters, why very large bottles are usually a false economy, and why plastic bottles, pouches and many cans are best avoided if you care about both polyphenols and endocrine-disrupting chemicals.

Finally, we tackle how to cook with EVOO in real life. We bust the “only use it cold” myth, and look at how to make olive oil your default fat for salads, sautéing and roasting so you naturally drift towards that 10–30 ml/day “benefit zone” - without drinking it by the shot.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

This week’s episode is about extra-virgin olive oil as a small daily habit that quietly pulls several big levers at once.

We look at why regular EVOO use keeps turning up in the data alongside lower risk of early death, fewer deaths from heart disease, cancer and dementia, a lower risk of type 2 diabetes and osteoporotic fractures, and slightly better weight and waist outcomes - even though it’s a calorie-dense fat.

We break down the practical “benefit zone” of roughly 10–30 ml a day (about 2 teaspoons to 2 tablespoons), why you don’t need to aim for Mediterranean-level intakes, and why the real magic is what EVOO replaces: butter, margarine, ghee, lard, hard spreads, cheap vegetable oils, mayonnaise and creamy sauces.

We’ll also put some common worries into context - especially the fear that “oil is fattening” and must be used in homeopathic amounts if you care about your weight.

By the end of the episode, you’ll have a clear picture of how much olive oil you’re probably getting now, which other fats are doing most of the day-to-day work in your kitchen, and where the easiest opportunities are to let EVOO take over some of those jobs.

Next week, we’ll build on that by looking at which bottles are actually worth buying - and how to use them well.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this episode of One Health Tweak a Week, we zoom out from the protein hype and ask a calmer question: given your age and how you actually eat, how much protein makes sense – and are you anywhere near it?

Everywhere you look, the message is “add more protein”. High-protein labels are slapped on yogurts, cereal, bread, ice cream and snacks; fitness feeds throw around magic numbers like 0.8 g/kg, 120 g a day, 1.6 g/kg for “gains”.

But big national surveys suggest most under-65s are already at around 1.0–1.3 g/kg, and large cohort studies hint that the lowest risk of early death for many adults sits nearer 0.7–0.9 g/kg, not the bodybuilder targets.

We’ll unpack how that picture flips in later life, where the real danger becomes too little protein, muscle loss and falls, and why many older adults quietly slide down to 0.6–0.8 g/kg just as they may need closer to 1.0–1.2 g/kg (if kidneys allow) to stay strong and independent.

Then we’ll walk you through a simple two–three day protein check-up so you can estimate your own intake in g/kg and see, by age band, whether your bigger risk is too little protein, too much, or the wrong kind – and make one calm, age-appropriate tweak instead of chasing the loudest voice online.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

If you’re eating pretty well, avoiding sugar-sweetened drinks, and your belt still feels tighter than it should, this episode is for you.

In last month’s belly-fat episode, we asked listeners to upgrade just one ultra-processed eating occasion. More than half chose their snacks. That made me curious - and when I dug into the data, it made sense.

For many adults, snacks now provide around a quarter of daily calories, and a disproportionate share of added sugar, saturated fat, and ultra-processed food. In other words, your “just a biscuit” moments might be doing more damage than your meals.

In this episode, we’ll look at why snacks are such a powerful lever for visceral fat and metabolic health, including a brain-imaging study where eight weeks of high-fat, high-sugar snacking actually changed how people’s reward circuits responded to rich foods. We’ll talk through the big danger zones - the late-morning or mid-afternoon slump and the after-dinner treat - and why the underlying need (hunger, tiredness, or reward) matters.

Then we’ll get practical. We’ll walk you through a two-minute snack audit, simple design rules for a “waist-friendlier” snack, and a menu of options that still feel like real treats. We’ll finish with a 7-day “snack upgrade” experiment designed to be small, realistic, and surprisingly powerful.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

In this episode of One Health Tweak a Week, we zoom out from individual habits - bedtime, breakfast, evening screens - and look at the bigger system they all feed into: your body’s internal clock.

We’ll walk you through what circadian rhythms are, why you have one master clock in the brain and lots of local clocks in organs like the liver and gut, and why health isn’t just about what you do but when you do it.

We’ll look at large studies showing that people with fragmented, irregular 24-hour routines have higher risks of dementia, stroke, Parkinson’s disease, anxiety and even early death, even when their total sleep time looks “fine”. We’ll touch on shift work, social jetlag, and why midlife is when circadian misalignment really starts to bite.

Then we bring it back to something practical: a simple way to sketch your own 24-hour rhythm so you can see where your life and your body clock are currently out of sync. No perfection, no overhaul - just observation.

If you’re someone who already cares about sleep, diet and exercise, this episode will help you connect those dots into one overlooked pillar: living in better rhythm with your body clock.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

We’ve been told to eat our five a day for as long as we can remember - but what does the evidence actually say? And how much fruit do you really need to see measurable health benefits?

In this episode of One Health Tweak a Week, we look at three decades of data from over 100,000 adults to uncover the surprisingly strong link between whole fruit intake and healthy ageing. We’ll cover why fruit topped the leaderboard in a major study of people who reached age 70 free from major disease or disability - and what makes whole fruit different from juice, smoothies, or added sugars.

You’ll learn:

* Why 200 grams / 7oz a day (about a double handful) seems to be the sweet spot

* How fruit is linked to lower risk of heart disease, stroke, diabetes, and dementia

* How to make fruit a daily habit - even if you’re more biscuit than berries

* And why your fruit bowl might be judging you (just a little)

This isn’t about superfoods or expensive berries. Just one tweak - easy to measure, easier to keep.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

If you’ve ever thought, “I’m already doing quite a lot… surely the only way to get healthier is to overhaul everything,” this episode is for you.

This week, we dig into a new Lancet analysis of nearly 59,000 adults that asks a deceptively simple question: what happens when you make small, combined improvements in sleep, movement, and diet - instead of trying to perfect just one?

You’ll hear how higher SPAN scores (Sleep, Physical Activity and Nutrition) were linked with extra years of total and disease-free life, why the steepest gains appear at the bottom of the curve, and what that means if you - or someone you care about - are starting from a less-than-ideal baseline.

We’ll walk through concrete examples from the study:

* How 5 extra minutes of sleep, 2 minutes of moderate-to-vigorous movement, and ½ cup of veg a day mapped to about one extra year of life, and

* How slightly bigger but still realistic changes were associated with around five extra years.

We’ll also talk about sweet spots for sleep and activity (yes, more is not always better), why doing “a little in two lanes beats doing a lot in one”, and how this paper quietly validates the whole One Health Tweak a Week approach.

If you’re ready to choose one or two tiny, stackable tweaks this week, press play.

If you’d like to see the graphs and scoring criteria so you can see where you are on the SPAN scale, head over to the newsletter version of this podcast. You’ll find it here.

The One Health Tweak a Week newsletter has now been read over 100,000 times. Subscribe to get it in your inbox every Saturday.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

This week on the One Health Tweak a Week podcast, we’re wading into the high-protein craze.

Everywhere you look there’s another “protein” label – bars, cereals, puddings, even water. You’re told more protein will help you build muscle, burn fat, and age well. At the same time, you may have heard whispers that too much could be harmful. So are high-protein foods actually helping your health – or just helping someone sell more ultra-processed snacks?

In this episode, I walk through why protein has become the wellness world’s favourite nutrient and Big Food’s favourite health halo, and who is actually likely to be getting too much versus too little. We’ll talk about how “high protein” can act as a Trojan horse for additives and refined starches, and why chasing 150 g a day can distract from basics like plants, movement, sleep, and, in later life, getting enough protein in real meals.

Then we land on this week’s tweak: dropping just one high-protein junk food a day and swapping it for real food (or nothing at all). It’s a calm, doable reset – especially if your trolley has quietly filled up with “protein” everything.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

This week on One Health Tweak a Week, we’re talking about belly fat that isn’t just cosmetic - the visceral kind packed around your organs.

You can have a “healthy” weight on paper and still be quietly accumulating fat in the wrong place. Visceral fat sits deep in the abdomen and chest, wrapped around organs like the liver, intestines, pancreas and even the heart - and it’s strongly linked with insulin resistance, type 2 diabetes, abnormal blood fats, fatty liver disease, cardiovascular disease and more.

The frustrating part? Your waist can worsen while the bathroom scales behave.

The encouraging part? You don’t need a full lifestyle overhaul to start shifting things. In this episode, I’ll explain why your waistline is a better “metabolic vital sign” than weight alone - and why ultra-processed foods are a high-leverage first place to start.

Then we’ll run a simple 7-day experiment: identify your most ultra-processed eating occasion (often breakfast or snacks), and upgrade just that one meal for a week. No calorie counting. No perfection. Just a repeatable swap you can actually stick to - plus the friction-killers that stop this kind of change dying after two days.

If you want 2026 to be the year your waistband eases up - and your long-term health gets stronger with each small shift - start here.

If you’d like the printable or interactive tracker that accompanies this episode, you can download it from this week’s newsletter:

Start Tackling Belly Fat: 7-Day Ultra-Processed Food Experiment

I’ve also built an interactive tool that will ask you a few questions, then do all the hard work for you. You’ll just need your height and waist measurements. You can access it here.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

This week’s episode is a New Year check-in - a little different from the usual “here’s one tweak” format.

Over the past year, One Health Tweak a Week has grown into a lively, health-literate community: curious, sceptical of fads, and far more interested in what actually moves the dial than what’s merely trendy.

Looking back at comments and polls, a few patterns stood out. You loved the calm, practical food rules that make everyday decisions feel simpler. But some sticking points remain stubbornly common - especially sleep (waking in the night) and long stretches of sitting, even among people who walk regularly.

The bigger lesson is one most of us already know: information isn’t the main problem. The gap is implementation - the space between “that’s a good idea” and “this is what I do now”.

So in 2026, the focus shifts slightly: less new information for its own sake, more help with follow-through. In this episode, you’ll hear the small change I’m making, plus a simple three-prompt mini exercise you can use to turn one good intention into something that’s actually easier to do this week.

If you want the trackers/checklists/tools we’re building, they’ll live in the newsletter. Sign up below.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Links to this year’s most popular posts as mentioned in the podcast:

* Ignore the Noise: The Simple Eating Rules That Save Lives

* The Only Food List You’ll Ever Need for Healthy Ageing?

* Eat Carbs, Age Better: What 47,000 Women Taught Us

* The Gut-Friendly Carb Linked to Longer Life

After eleven months of sending out weekly “health tweaks”, I did the slightly uncomfortable thing: I looked back and asked what actually changed in my own life.

This is a Christmas special, and it’s not a lecture. It’s a behind-the-scenes, mildly embarrassing report card on what happened when evidence-backed ideas met real life: deadlines, preferences, and the strange power of the bakery section in Marks & Spencer.

You’ll hear about the tweaks that genuinely stuck (including my new hard rule on microwaving food in plastic, and how that accidentally turned me into a “jar person”), the ones that half-worked (hello, 18°C office), and the ones I still routinely lose to my own habits (late nights, anyone?).

There are also cameos from: tins of mackerel, a demoted oven, and matcha - which I drink standing up in the kitchen like I’m taking antibiotics, followed immediately by a square of dark chocolate as compensation.

If you’ve ever read health advice thinking “yes… and yet”, this one’s for you. It’s a reminder that the work isn’t knowing; it’s designing a life where the sensible option is also the easy one.

Most of us know we “sit too much”, but how much is too much - and can a daily walk or gym session really cancel it out?

In this episode, I dig into what the research actually says about long days spent sitting and your risk of early death, heart disease, type 2 diabetes and cancer. We’ll look at where the risk curve really starts to bend upwards (spoiler: it’s lower than you might think), and why you can be physically active and still sedentary if most of your waking hours are spent in a chair.

I’ll walk you through how much movement - and what intensity - seems to blunt the damage of 8-10 hours of sitting, using simple tools like the “talk test” and your heart rate if you wear a watch. No physiology lecture, just clear rules of thumb.

Then we’ll get practical. How do you build an hour or so of movement that gets you at least a little out of breath into real life - whether you’re office-based, working from home, or retired? We’ll talk brisk walks, chores that genuinely count as exercise, and short movement breaks that help your body handle blood sugar while you’re still at your desk or on the sofa.

Ideal listening if you spend a lot of the day sitting, but want Future You to have many more active years to enjoy.

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

Is all this effort to “eat healthier” actually worth it - in years of life, not just in vague virtue points?

In this episode of One Health Tweak a Week, we dig into two big pieces of research that try to answer exactly that. Using data from hundreds of thousands of people in the UK and six other countries, researchers modelled what happens to life expectancy when you move from a typical Western diet to something healthier - and then to a fully “longevity-optimised” plate.

We’ll talk through what the numbers really say: why realistic changes in midlife can still add several extra years to your life, and how, in some cases, bigger shifts might buy you 7–10 extra years.

We’ll also look at what those diets actually look like, from a gram-perfect longevity plan to the much simpler UK Eatwell Guide, which still delivers about 80-plus percent of the benefit.

Most importantly, we’ll translate the modelling into something you can act on this week. You’ll hear why four levers - nuts, whole grains, sugary drinks and processed meats - do most of the heavy lifting, and how to pick just one to focus on without feeling you have to become a saint overnight.

If you’ve ever wondered whether changing what’s on your plate really moves the needle, this episode is for you.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Some people can fall asleep anywhere, any time. For everyone else, there are two main weak spots that make nights miserable: getting to sleep in the first place, and waking at 3–4 am and not getting back off.

In this episode, we’ll walk you through a joined-up, practical plan for both.

We’ll start with the quiet culprits that wire you up during the day - social jetlag, naps, caffeine, alcohol, late meals and screens - and how they set you up for “tired but wired” nights and early-morning wakefulness.

From there, we build a realistic evening wind-down buffer: a 60–90 minute slope into sleep, not a cliff-edge you fall off at “bedtime”. You’ll hear how to choose a few simple anchors (reading, journalling, a warm shower) and one hard boundary that actually protects your nights.

Then we tackle the two patterns separately:

* If you can’t drift off, we’ll use a short worry window and a shift in mindset so you stop trying to force sleep.

* If you keep waking at 3 am, we'’ll show you how to create a kind 3 am corner and use the “if I’m clearly awake, I get up” rule without wrecking the rest of the night.

You’ll come away with a 7-night experiment you can start tonight - and a simple playbook you can lean on the next time your brain won’t switch off.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

You probably know the feeling: you’re exhausted, you’ve tried all the usual sleep tips… and yet your brain refuses to get the memo.

In this episode, we’re not adding more “sleep hacks” to the pile. We’re asking a different question: what if your problem isn’t sleep, it’s timing?

I’ll walk you through the two systems that quietly run your nights - sleep drive (how long you’ve been awake) and your circadian clock (your internal 24.2-hour metronome). We’ll look at how indoor days, late screens, irregular meals, naps, lie-ins and weekend drift slowly prise those systems apart, raising not just sleep problems but risks linked to metabolism, appetite, blood pressure, mood and long-term health.

Then we’ll get practical.

You’ll learn the six anchors of circadian alignment:

* A realistic, consistent wake-up window

* Morning light (and why grey skies still count)

* Evening dimness and screen timing

* Earlier, more regular meals

* Sensible rules for naps and lie-ins

* Consistency between weekdays and weekends

We’ll finish with a 14-day “anchor protocol” you can actually follow, plus a simple way to track whether your body clock finally knows what time it is.

If you’ve ever thought, “I’m just bad at sleep,” this episode is my case for a gentler explanation - and a much more hopeful fix.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

If you’re not sleeping well, chances are you’ve already tried the basics - less caffeine, fewer screens, maybe even a magnesium supplement or two. But what if the problem isn’t your bedtime routine… but something deeper you haven’t yet spotted?

In this episode, we walk through a 7-step self-audit to help you figure out what’s really going wrong with your sleep - and why. You’ll learn how to:

* Identify your true sleep pattern (is it falling asleep, staying asleep, or waking up exhausted?)

* Spot lifestyle, hormonal, or emotional factors that might be at play

* Rule out the usual suspects - from light and noise to caffeine and wine

* Recognise medical red flags that signal it’s time to speak to a doctor

* Pull together a simple, personalised “sleep hypothesis” to guide your next steps

This isn’t just another sleep hygiene checklist. It’s a structured, evidence-backed process that helps you stop guessing - and start seeing the patterns in your own nights.

Whether you’re lying awake at 3 a.m. or waking up foggy after a full night’s sleep, this episode will help you understand what’s going on - and where to start making changes.

Perfect for your next walk, commute, or wind-down.

🧰 Prefer a guided version of this sleep audit?

If you don’t have pen and paper handy - or just want to speed things up - I’ve built a free interactive tool that walks you through this same 7-step process.

It helps you:

* Identify which sleep disruptors are most likely affecting you

* Flag any warning symptoms to discuss with your doctor

* Get tailored next steps based on your responses

🟢 Try the Sleep Self-Audit Tool

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Can your diet really change how acidic your body is? And if so… should you care?

This week, we’re diving into the alkaline diet - the wellness trend that claims eating “alkaline-forming” foods (like leafy greens and lemons) and avoiding “acid-forming” ones (like meat, cheese, and eggs) can lower your cancer risk, improve your bones, balance your hormones, and even cure reflux.

But how much of that is science… and how much is marketing theatre?

We’ll unpack what the alkaline diet actually is, what a PRAL score measures, and why your blood pH isn’t something you can tweak with lunch - unless you’ve ingested antifreeze.

You’ll hear why the apparent benefits of “alkaline” diets are more likely due to eating more plants and fewer animal products, not a change in internal chemistry.

We’ll also look at:

* The one condition where acid load really matters (and why this doesn’t apply to most people)

* Whether alkaline diets help with acid reflux (spoiler: not really)

* How to eat more plant-based without falling for pseudoscience

Perfect for anyone who’s ever googled “alkaline foods” or wondered whether their urine pH means anything.

Listen in and get clarity - minus the pH strips.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Naps can be magic - or a mistake. In this episode of One Health Tweak a Week, we dive into the science behind daytime naps: when they help, when they harm, and how to get them right.

You’ll hear why short naps (under 30 minutes) can sharpen your focus, mood, and memory - even if you already sleep well at night.

But you’ll also learn about the darker side of daytime dozing: longer naps, especially those over 45 minutes, have been consistently linked with higher risks of cardiovascular disease, type 2 diabetes, obesity, and even premature death.

We’ll explore why these risks emerge, from the stress of waking up twice a day to disruptions in your body’s internal clock. And we’ll walk through a simple checklist to help you nap safely: how long, when, and how often.

Whether you’re a proud napper or a reluctant one, this episode will help you nap with confidence - or rethink whether you should nap at all.

🎧 Perfect for a walk, commute, or a mid-afternoon energy slump.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Ever feel bloated or uncomfortable after what should have been a perfectly healthy meal?

It might not be your imagination - and it might not be gluten, dairy, or stress, either. In this episode, we’re talking about FODMAPs: a group of fermentable carbohydrates found in everyday foods like fruit, legumes, dairy, wheat, and vegetables like onions and garlic.

For most people, these carbs are beneficial. But for some - particularly those with IBS or sensitive guts - they can trigger symptoms like bloating, cramps, diarrhoea, or constipation.

We’ll unpack what FODMAPs are, how they behave in the gut, and why they cause problems for some people but not others.

You’ll learn how to spot a possible FODMAP pattern, why you shouldn’t start restricting foods without professional guidance, and what to do if your symptoms have been dragging on.

We’ll also walk through the evidence behind low-FODMAP diets, what the research really shows, and why this isn’t something to try off a blog post or a checklist alone.

Whether your gut is peaceful or unpredictable, this episode will help you decide if FODMAPs matter for you - and what to do next if they do.

This podcast is for general information only and is not a substitute for professional medical advice, diagnosis, or treatment. If you’re experiencing new, persistent or worrying symptoms, please consult your doctor.

The aim is to help you have more informed conversations with healthcare providers - not to diagnose or treat anything yourself.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Do you really need 10,000 steps a day? The science just got sharper.

This episode breaks down the largest device-based analysis to date - hundreds of thousands of people across 88 studies - and the results might surprise you.

Turns out, the biggest drop in early death risk happens not at 10,000 steps, but much earlier. We’re talking steep gains by 6,000 steps, especially for heart disease, cancer mortality, and overall longevity.

But it’s not just about staying alive. We also cover what the data says about:

* Dementia risk, which continues to fall all the way to 8,000–10,000 steps

* Depression, where the relationship is almost linear - the more you walk, the better you feel

* Type 2 diabetes, falls, and why walking protects your health even beyond weight control

We also touch on a new Nature Communications study showing that intensity may matter more than we thought. Just 1 minute of vigorous activity could offer the same benefit as 50–150 minutes of light activity. That doesn’t mean ditching steps - it means turning some of them into stronger steps.

By the end, you’ll know which targets are worth aiming for, where the health sweet spots lie, and how to personalise your walking habits based on time, fitness, and goals.

Walking isn’t just exercise - it’s preventive medicine with a daily dose.

If you’d like to see the graphs discussed in this episode, you can find them here.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Is eight hours of sleep really the ideal for adults - or just a widely accepted myth?

In this episode of One Health Tweak a Week, we examine what decades of high-quality research reveal about the relationship between sleep duration and long-term health.

Drawing on meta-analyses and cohort studies involving millions of participants, we explore why seven hours of sleep per night may be more consistently linked to better outcomes than the traditional eight. Across multiple conditions - including cardiovascular disease, type 2 diabetes, dementia, and all-cause mortality - the data show a U-shaped curve, with risk increasing at both ends of the sleep spectrum.

We also look at studies on sleep timing and regularity, including evidence that going to bed between 10 and 11 pm and waking around 6 to 7 am may align best with our internal clocks and reduce cardiometabolic risk.

This episode distils the clearest signals from a complex literature - helping you understand how much sleep is associated with healthier ageing, and why the answer might not be what you were told.

If you’d like to see the graphs discussed in this episode, have a look at this week’s newsletter.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Most of have heard for years that carbs are the enemy. But what if cutting carbs wasn’t the key to ageing well - and might even work against us?

In this week’s episode of One Health Tweak a Week, we take a fresh look at the carbohydrate question through the lens of a massive new analysis from the legendary Nurses’ Health Study. This isn’t about fad diets or weight loss tricks - it’s about what helps you reach your seventies still sharp, still active, and free of major disease.

You’ll hear:

* Why low-carb isn’t always better - and where the data says the sweet spot lies

* Which types of carbohydrates are most strongly linked to healthy ageing

* The single best label trick for spotting healthy carbs at a glance

* Simple food swaps that could shift your risk without overhauling your whole diet

We also bust some long-held myths, explain how fibre and glycaemic index play into it all, and explore why only 7.8% of women in this 30-year study hit the healthy ageing benchmark.

If you’ve ever felt confused about what carbs to eat - or whether you should be eating them at all - this episode clears the fog.

Listen in while you prep dinner, go for a walk, or just need a grounded voice cutting through the health hype.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Most supermarket bread is marketed as wholesome - but a closer look tells a different story.In this episode we dig into the additives hiding in everyday loaves, from gluten boosters to “natural flavours,” and explain why one common preservative, calcium propionate, stands out. You’ll learn:

* Why even wholemeal bread qualifies as ultra-processed food

* How calcium propionate can disrupt blood-sugar control and weight regulation

* Simple ways to find - or bake - a cleaner, tastier loaf

Full charts and references are in the newsletter.

Please consider signing up. We’d love to have you!

Science-backed advice, simple steps, real results. Subscribe to the One Health Tweak a Week newsletter today and take the guesswork out of healthy living.

Monounsaturated fats don’t get much airtime.

Health advice tends to focus on cutting saturated fats or getting enough omega-3s - but hardly anyone talks about the fat we might need the most.

In this episode, we shine a light on monounsaturates: the overlooked fats found in olive oil, nuts, seeds, and avocados that could have a profound impact on your long-term health.

Drawing from large population studies - including one that followed nearly 200,000 people for over a decade - we explore how getting the right balance of fats may lower your risk of dying prematurely by more than 60%. That’s not a typo.

You’ll learn:

* Why typical Western diets fall well short of the ideal monounsaturate target

* The difference between plant- and animal-derived sources - and why it matters

* The best oils for cooking (and the worst offenders hiding in your cupboard)

* Easy, everyday ways to rebalance your fat intake without counting grams or calories

🔊 Hit play, drizzle some extra virgin olive oil on your lunch, and let’s rethink the fats that are quietly shaping our future health.

“Eat the rainbow.”

“Thirty plants a week.”

These mantras are everywhere, from wellness blogs to Instagram reels. The idea sounds simple: the more variety on your plate, the healthier you’ll be. But does the science actually back that up?

In this week’s episode of One Health Tweak a Week, we dig into the research on dietary diversity - and what we find isn’t as neat and colourful as the slogans suggest. Yes, restrictive diets are risky: living mostly on meat and potatoes, or tea and toast, is a fast track to nutrient gaps and poor health outcomes. But beyond that, the evidence gets messy.

Some studies show broad benefits from variety, others find no effect, and a few even throw up contradictions - like reduced stroke risk in men but increased risk in women. How do we make sense of this? And, more importantly, what should end up on your plate?

We’ll look at why diversity scores can be misleading, when variety matters most, and why the smartest approach is to build your variety from the foods most strongly linked to healthy ageing - not to chase novelty for its own sake.

By the end, you’ll know how to spot the limits of the “rainbow” message, and how to put dietary diversity to work in a way that actually supports longevity.

Here’s the green list of foods most strongly linked to healthy ageing discussed in the podcast:

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.

Tomatoes are one of the world’s favourite foods. From summer salads to steaming bowls of pasta, they show up everywhere.

But here’s the surprising part: that juicy raw tomato you slice onto your plate might actually deliver less of its most powerful nutrient than a spoonful of ketchup or a ladle of pasta sauce.

In this episode, we dig into the science of tomatoes, lycopene, and longevity.

You’ll hear why tomatoes have earned their reputation as a superfood - bringing potassium, vitamin C, folate, fibre, and antioxidant polyphenols to the table.

But we’ll also uncover the hidden trick: it’s not just about how many tomatoes you eat, but how you prepare them.

Cooking breaks down the plant cell walls, heat transforms lycopene into a more absorbable form, and olive oil unlocks its fat-soluble potential. Together, that turns a simple ragu into a powerful longevity tool.

We’ll explore what the research shows - lower risks of cardiovascular disease, stroke, prostate cancer, and even premature death - and break down exactly how much you need to get the benefit.

You’ll also get practical meal ideas, from shakshuka to roasted tomato soup, so you can turn everyday cooking into a health tweak that pays off for years.

Join us as we turn your next tomato dish into more than dinner - it’s a quiet investment in your long-term health.

Science-backed advice, simple steps, real results. Subscribe to One Health Tweak a Week today and take the guesswork out of healthy living.