Karly Raven is a naturopath, clinical nutritionist, and microbiome enthusiast, specialising in supporting individuals with IBS, SIBO, and IBD. As the founder and principal naturopath of a thriving online practice, Karly offers comprehensive care through her renowned Nourished Gut Program. She also leads the SIBO Food Roadmap Practitioner Training, equipping fellow health professionals with the expertise to effectively address SIBO/IBS/IBD in their practice. Additionally, Karly provides guidance and mentorship through her Thrive Practitioner Mentoring program, empowering others to excel in their business. With a focus on the microbiome and addressing root causes, Karly is dedicated to delivering holistic healthcare solutions that foster lasting transformation for those struggling with chronic gut issues.
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Episode 85: Meet Your Microbiome: The 100 Trillion Guests Running Your Health
Episode 85
Thursday, March 26, 2026 • Duration 26:50
EPISODE SUMMARY
If you've ever wondered what the microbiome actually is, and why every practitioner seems to be talking about it, this is the episode to start with. Karly Raven breaks down what's living in your gut, why diversity is the number that matters most, what's disrupting it for so many women, and what it actually takes to restore it.
This isn't a 30-second explainer. This is the full picture, with the clinical context, the honest caveats, and the practical starting points that most gut health content skips.
KEY TAKEAWAYS
Your microbiome contains around 100 trillion microorganisms and their diversity directly shapes your digestion, immunity, mood, skin, hormones, and more
Dysbiosis is driven by far more than antibiotics: chronic stress, processed food, restrictive diets, and gut infections all play a role
Diversity is the metric that matters most. A high-diversity microbiome is more resilient, more anti-inflammatory, and better at restoring itself after disruption
The most evidence-based way to increase diversity is to eat 30+ different plant foods per week. Variety matters more than quantity
Restoration is not just about food. Sleep, movement, and nervous system regulation are all essential parts of rebuilding microbiome health
IN THIS EPISODE
Part 1: What the microbiome is and why it matters
Part 2: The most common drivers of microbiome disruption
Part 3: Why diversity is the key metric to focus on
Part 4: Evidence-based strategies to restore and rebuild
REFERENCES
Sender R et al. (2016). Revised estimates for the number of human and bacteria cells in the body. Cell, 164(3), 337-340.
McDonald D et al. (2018). American Gut: an open platform for citizen science microbiome research. mSystems, 3(3).
Wastyk HC et al. (2021). Gut-microbiota-targeted diets modulate human immune status. Cell, 184(16), 4137-4153.
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
...
Episode 84: Why Does My SIBO Keep Coming Back? Understanding SIBO Relapse and IBS Flare-Ups
Episode 84
Tuesday, March 3, 2026 • Duration 12:02
If you’ve treated SIBO and felt better, only for your symptoms to return — you’re not alone.
SIBO relapse and recurring IBS flare-ups are extremely common. Many people complete a round of antimicrobials, follow a strict low FODMAP diet, or take targeted supplements, and experience temporary improvement. Then the bloating, discomfort and food sensitivities slowly return.
So why does SIBO keep coming back?
In this episode, I explain the most common reasons for SIBO recurrence, including unresolved motility issues, long-term restriction without rebuilding digestive resilience, reduced digestive capacity, and the role of the nervous system in gut function.
If you’ve been wondering:
• Why does my SIBO keep recurring? • Why do my IBS symptoms flare up again after treatment? • Is low FODMAP enough to heal SIBO? • How do I prevent relapse long term?
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
Episode 75: Inside Out: Weight, Metabolism, and Your Microbiome
Season 2
Saturday, March 2, 2024 • Duration 24:56
Join Karly on Nourished Gut as we explore how gut bacteria composition affects our metabolism, appetite, and energy. Discover the link between gut health and weight management challenges, and find out why microbiome testing is crucial for better gut health. Listen in if you're eager to explore new gut health possibilities!
Tune in to find out:
The patient’s story that inspired this episode
How our microbiota respond to the food we eat
The link between gut health and weight management
The importance of microbiome testing
Microbiome imbalance-specific fibres
Interpreting results based on your individual health concerns
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and join the Nourished Gut Program to utilise the SIBO Food Roadmap in your treatment plan.
Episode 74: Ironing Out the Link: SIBO, IBS, and Iron Deficiency
Season 2
Saturday, February 24, 2024 • Duration 28:13
This week, Bernadette is back to chat about iron deficiency, its symptoms and causes, and why it's not always wise to rely solely on your symptoms when considering iron supplementation. She also shares some tips and recommendations to increase iron absorption in your gut, and much more!
Tune in to find out:
Symptoms of iron deficiency
Why you shouldn’t take iron supplements based on symptoms only
Some general causes of low iron
Recommended daily intake of iron
Foods that can increase and hinder iron absorption
Iron considerations during pregnancy and postpartum
Why exercise and sports training may result in decreased iron levels
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and join the Nourished Gut Program to utilise the SIBO Food Roadmap in your treatment plan.
Download my Gut 40 eBook for guidance on how to start nourishing your gut.
Do you have an unhealthy gut? Take my Gut Health Quiz and find out now!
Head over to karlyraven.com for more Nourished Gut episodes, free resources, and information about my programs.
Episode 73: Gut Feelings: Unveiling the Link Between Maternal Mental Health and Your Belly Bugs with Kate Harrison
Season 2
Saturday, February 17, 2024 • Duration 41:15
This week, Karly sits down for a chat with Naturopath, Ayurvedic Postpartum Doula, and mother of three, Kate Harrison. Kate brings an East meets West approach into motherhood and postpartum care, breaking the taboo of maternal mental health challenges. Join us for an enlightening chat with a personal touch, and dive into the connected topics of maternal mental health, pregnancy, and motherhood support.
Tune in to find out about:
How maternal mental health is defined
Mental health challenges faced by postpartum mothers
The effects of hormonal shifts and imbalances in the postpartum period
How your gut microbiome influences your brain function and mental health
The importance of prioritising your preconception care for prevention
Testing nutritional values
An insight into Ayurvedic treatment in postpartum motherhood
Kate’s top practical tips for new mothers
Some interesting studies that highlight the importance of supporting your gut and body
Find my guest episode ‘Gut Health, Probiotics and the Microbiome for Pregnancy, Birth and Beyond’ on The Little Yarrow Podcast here.
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and join the Nourished Gut Program to utilise the SIBO Food Roadmap in your treatment plan.
...
Episode 72: Finding Constipation Relief Through Food: Dietary Interventions for Intestinal Methane Overgrowth (IMO)
Season 2
Saturday, February 10, 2024 • Duration 37:40
In this episode of the Nourished Gut Podcast, we explore why restrictive diets might not be the best solution for Intestinal Methane Overgrowth and constipation, and hear about the positive outcomes of inclusive diets from the Nourished Gut Clinic. Join Karly as she dives into the latest research with us and discover alternative approaches to managing your constipation and gut health issues.
Tune in to find out:
Whether a restricted diet is actually the best option
The typical characteristics of constipation
Various factors that might be causing your constipation
Medical conditions that can be associated with constipation
Karly's easily implementable tips when dealing with constipation and IMO
The similarities and differences between IMO and SIBO
Outcomes of inclusive diets in the Nourished Gut Clinic
Some interesting studies confirming our findings
Interested in the studies Karly mentioned? Check out them out below:
Does a diet low in FODMAPs reduce symptoms associated with functional gastrointestinal disorders? A comprehensive systematic review and meta-analysis https://pubmed.ncbi.nlm.nih.gov/25982757/
Manipulation of dietary short chain carbohydrates alters the pattern of gas production and genesis of symptoms in irritable bowel syndrome https://pubmed.ncbi.nlm.nih.gov/20659225/
A low FODMAP diet is associated with changes in the microbiota and reduction in breath hydrogen but not colonic volume in healthy subjects https://pubmed.ncbi.nlm.nih.gov/30048547/
Episode 71: Natalie's Path to Wellness with SIBO and Hashimoto's
Season 2
Saturday, February 3, 2024 • Duration 35:07
In this episode, join Karly as she chats with Natalie, a client of the Nourished Gut Program. Nat shares her journey of becoming SIBO-free and managing the symptoms of Hashimoto's Thyroiditis while working closely with Karly and Bernadette. Discover how she navigated the challenges of adhering to her treatment plan while travelling across Australia and hear a real-life client perspective on overcoming gut symptoms with the help of the Nourished Gut Program and the SIBO Food Roadmap.
Tune in to find out:
Natalie’s gut symptoms before joining the Nourished Gut Program
The confusion when trying to navigate which foods helped and hindered her symptoms
Which big goals from the beginning of Nat’s journey has she achieved
Karly’s treatment protocol to manage Nat’s SIBO and Hashimoto’s symptoms
Nat’s honest experience with the Nourished Gut Program and SIBO Food Roadmap
Our favourite recipes and meals from the SIBO Food Roadmap
An insight into the challenges Nat faced when travelling Australia while working through her treatment plan
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and join the Nourished Gut Program to utilise the SIBO Food Roadmap in your treatment plan.
Download my Gut 40 eBook for guidance on how to start nourishing your gut.
Do you have an unhealthy gut? Take my Gut Health Quiz and find out now!
...
Episode 70: Living Well with IBS & SIBO: Empowering Solutions for Symptom Management
Season 2
Saturday, January 27, 2024 • Duration 25:42
Bernadette joins us this week to talk about managing your IBS and SIBO symptoms. She highlights the importance of uncovering those underlying causes, gives us some low-cost and no-cost strategies for symptom management, and shares how to create the ideal pooping position at home. If you suffer from chronic gut symptoms, you won’t want to miss this episode!
Tune in to find out:
Some great dietary strategies to help manage your symptoms
Your recommended daily fibre intake
The perfect position for making it easier to pass stools
An accessible and helpful probiotic strain
Using the low FODMAP diet to manage symptoms
Easy food swaps for a gentle FODMAP diet introduction
How your eating patterns can affect your symptoms
Some delicious breakfast ideas!
Tips for shift workers dealing with IBS symptoms
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and join the Nourished Gut Program to utilise the SIBO Food Roadmap in your treatment plan.
Download my Gut 40 eBook for guidance on how to start nourishing your gut.
Do you have an unhealthy gut? Take my Gut Health Quiz and find out now!
Head over to karlyraven.com for more Nourished Gut episodes, free resources, and information about my programs.
...
Episode 69: Ageing Well: The Gut-Diet Connection for Lifelong Health with Lucia Rivas-Herry
Season 2
Saturday, January 20, 2024 • Duration 54:46
In this episode, we chat with Lucia, a Chemical and Biomedical Engineer, Registered Nutritionist, certified SIBO Roadmap practitioner, and Microbiome Expert. We dive into her journey of bodybuilding competitions sparking her passion for healthy ageing and the microbiome. Discover the link between gut health and ageing, insights from studying centenarians' gut microbiomes, and Lucia’s tips and recommendations for healthy ageing.
Tune in to find out:
An insight into Lucia’s passion for healthy ageing and the microbiome
How bodybuilding competitions sparked Lucia’s interest in diet and health
Why your gut health changes the way you age
Findings from studies of the gut of centenarians
Foods and dietary habits important for healthy ageing
Combining foods for optimal nutrient absorption
Lucia’s experience using the SIBO Food Roadmap in her clinic
Why we think everybody should do a microbiome test
Lucia’s recommendations for ageing well and maintaining good gut health
Interested in the research Lucia mentioned? Find the studies here:
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and to utilise the SIBO Food Roadmap in your treatment plan.
...
Episode 68: Berberine & SIBO: New Research and Developments
Season 2
Saturday, January 13, 2024 • Duration 25:23
Join us as Karly dives into the buzz around Berberine, a popular plant compound used for treating gut issues and metabolic conditions. Karly discusses the recent studies and controversy surrounding it, highlights the importance of personalised treatment plans and explains Berberine’s place in the Nourished Gut Clinic.
Tune in to find out:
What Berberine is and its common uses
Details of the new studies surrounding Berberine and its effects
How our clinical recommendations and prescriptions differ from the studies
Why combining individualised modalities of therapies is most beneficial
How Berberine has a place in the Nourished Gut Clinic
Managing SIBO patients with appropriate testing and follow-up protocols
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and join the Nourished Gut Program to utilise the SIBO Food Roadmap in your treatment plan.
Download my Gut 40 eBook for guidance on how to start nourishing your gut.
Do you have an unhealthy gut? Take my Gut Health Quiz and find out now!
...
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
This podcast information is provided for educational purposes only, and is intended to be used only in conjunction with individual support from a professionally qualified and trained practitioner. It does not claim to diagnose, treat, cure or prevent disease and is not a substitute for appropriately qualified medical advice. It is a condition of use that you take full responsibility for your own health, safety and wellbeing, conduct your own research, consult your healthcare provider and make informed choices about what is right for you before making any changes to your diet or lifestyle.
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
This podcast information is provided for educational purposes only, and is intended to be used only in conjunction with individual support from a professionally qualified and trained practitioner. It does not claim to diagnose, treat, cure or prevent disease and is not a substitute for appropriately qualified medical advice. It is a condition of use that you take full responsibility for your own health, safety and wellbeing, conduct your own research, consult your healthcare provider and make informed choices about what is right for you before making any changes to your diet or lifestyle.
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
Download my Gut 40 eBook for guidance on how to start nourishing your gut.
Do you have an unhealthy gut? Take my Gut Health Quiz and find out now!
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
Are you a client suffering from SIBO and seeking relief with diet therapy? Reach out and join the Nourished Gut Program to utilise the SIBO Food Roadmap in your treatment plan.
Download my Gut 40 eBook for guidance on how to start nourishing your gut.
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
Head over to karlyraven.com for more Nourished Gut episodes, free resources, and information about my programs.
This podcast information is provided for educational purposes only, and is intended to be used only in conjunction with individual support from a professionally qualified and trained practitioner. It does not claim to diagnose, treat, cure or prevent disease and is not a substitute for appropriately qualified medical advice. It is a condition of use that you take full responsibility for your own health, safety and wellbeing, conduct your own research, consult your healthcare provider and
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
This podcast information is provided for educational purposes only, and is intended to be used only in conjunction with individual support from a professionally qualified and trained practitioner. It does not claim to diagnose, treat, cure or prevent disease and is not a substitute for appropriately qualified medical advice. It is a condition of use that you take full responsibility for your own health, safety and wellbeing, conduct your own research, consult your healthcare provider and make informed choices about what is right for you before making any changes t
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
Head over to karlyraven.com for more Nourished Gut episodes, free resources, and information about my programs.
This podcast information is provided for educational purposes only, and is intended to be used only in conjunction with individual support from a professionally qualified and trained practitioner. It does not claim to diagnose, treat, cure or prevent disease and is not a substitute for appropriately qualified medical advice. It is a condition of use that you take full responsibility for your own health, safety and wellbeing, conduct your own research, consult your healthcare provider an
WORK WITH KARLY Ready to stop managing symptoms and start rebuilding? Karly takes a limited number of one-on-one clients each month through the Nourished Gut Program — applications are open: https://www.nourishedgutclinic.com/nourishedgut
FREE RESOURCE Not ready for that yet? Start here. Grab Karly's free 3-Day Bloat Fix — a short, practical protocol targeting the most common drivers of daily bloating: https://www.nourishedgutclinic.com/bloat
FOLLOW ALONG @karlyravennaturopath — clinical insights, gut health education & behind the scenes @nourishedgutclinic — the clinic page, client wins & what's on
ENJOYING THE PODCAST? A rating and review takes 30 seconds and helps more people find the show who really need it. Thank you.
DISCLAIMER Content shared on the Nourished Gut Podcast is for educational purposes only and is not medical advice. Always consult a qualified health practitioner before making changes to your health or treatment plan.
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