Explore every episode of the podcast Science & Wisdom

Why Cotton Candy, Mango, and Crème Brûlée: The Flavor Science Behind Vaping's Newest Regulatory Battle

A few months ago, on May 5, 2026, the FDA authorized the first-ever fruit-flavored vaping products — mango and blueberry disposables from Glas, Inc. — based largely on built-in Bluetooth age-verification technology, not new clinical evidence of smoking-cessation benefit. Days later, the agency also said it would deprioritize enforcement against unauthorized flavored products more broadly.

In this episode, Ella and Dr. J (toxicologist and Ella's mom) trace how we got here: from Hon Lik's 2003 invention of the e-cigarette as a harm-reduction tool, through JUUL's 2015 nicotine-salt breakthrough and the resulting teen vaping "epidemic," to two decades of regulatory whack-a-mole — bans with loopholes, disposables filling the gaps, and synthetic nicotine dodging oversight entirely.

They also dig into the chemistry: why flavoring chemicals deemed safe to eat (GRAS) can be dangerous to inhale, how diacetyl caused "popcorn lung" in factory workers and later turned up in flavored e-cigarettes, and how cinnamaldehyde, synthetic cooling agents, and heavy metals from degrading heating coils add their own risks — often with no requirement to disclose any of it on the label.

The episode closes with practical guidance for teens, parents, adult smokers considering switching, and clinicians navigating a market where the science and the regulations haven't kept pace with each other.

A spring run in the woods of North Carolina, where pollen clung visibly to hair and lungs, prompts a deeper question: when did the air start behaving this way? In this episode, Dr. J and Ella trace the history of allergies from a mysterious 19th-century condition (“summer catarrh”) to a modern, measurable immune response. They explore key discoveries - from early self-experiments linking pollen to symptoms, to the invention of pollen monitoring and the naming of “allergy” itself.

Drawing on decades of data, the conversation reveals how pollen seasons are starting earlier, lasting longer, and growing more intense - driven in part by climate change and rising CO₂, which increases both the quantity and potency of pollen. As allergy rates climb worldwide, what once seemed like a minor seasonal nuisance emerges as a powerful signal of environmental change - one our bodies are already detecting.

From Ancient Oracles to "Galaxy Gas": The history and biology of what humans inhale to feel something throughout history. Join Ella and her mom, toxicologist Dr. J, as they discuss the long, hazy history of recreational inhalants. From the gas-induced prophecies of the Oracle at Delphi and Victorian "ether frolics" to the modern-day risks of smelling salts, "Galaxy Gas," and vaporized alcohol, this episode breaks down why humans have always chased altered states, and how bypassing the body’s natural safety systems leads to potentially bad consequences. It’s a fascinating look at the chemistry of risk, the history of medicine, and why your lungs really just want air.

In this episode of Science & Wisdom, Ella and Dr. J unpack the science behind tear gas and pepper spray — chemicals most people assume are harmless, temporary irritants but which carry a far more troubling health profile than widely recognized. Drawing on emerging research, they explore how these agents work at the molecular level, hijacking pain-sensing nerve receptors (TRPV1 and TRPA1) to trigger immediate respiratory, ocular, and skin responses. But the conversation goes deeper: new studies are linking tear gas exposure to persistent respiratory damage, cardiac abnormalities detectable weeks after exposure, and striking reproductive health effects — including menstrual disruption in 83% of exposed individuals and community-level reports of increased miscarriage rates in heavily exposed populations.

Ella and Dr. J also confront a striking paradox: these chemicals are banned in warfare under the Geneva Protocol yet are routinely deployed on civilians, including children, pregnant women, and people with preexisting health conditions — the very populations never considered in original safety studies. A century of use has not been matched by a century of research, and federal funding to close that gap remains critically insufficient.

The episode closes with practical first-aid guidance for those exposed and a broader call for manufacturer transparency, evidence-based deployment policies, and the funded, independent research needed to protect public health.

CS = 2-chlorobenzalmalononitrile

CN = 1-chloroacetophenone

CR = dibenzy-1,4,oxazepane

OC = oleoresin capsicum

PAVA = Pelargonic Acid Vanillylamide

This conversation explores the origins, risks, and regulatory challenges surrounding Kratom, noting its long history of traditional use in Southeast Asia and its growing popularity in the West. While the plant’s alkaloids interact with opioid receptors, the shift toward commercialized products, especially vaping, has transformed its risk profile, as vaping delivers substances directly into the bloodstream and increases addiction potential. The lack of regulation and quality control, along with FDA safety concerns, underscores the urgent need for more research on the health effects of vaping Kratom. As these risks continue to emerge, public education, informed questioning, and greater regulatory oversight are essential to address the evolving health challenges posed by Kratom and its derivatives.

When the 2018 Farm Bill legalized hemp by defining it as cannabis containing less than 0.3% delta-9 THC, specifically vaping products, it unintentionally opened the door to a booming market for hemp-derived THC products like delta-8 and delta-10. DR. J and Ella explore how this single legal definition collided with modern chemistry, transforming the industry overnight and creating millions of unregulated products with almost no oversight and putting it into the historical context of cannabis and hemp.

This is a historical recap of electronic cigarettes, or e-cigs, from an idea in 1927 to products that can deliver over 5000 puffs, the equivalent delivery of nicotine as 16 packs of cigarettes, in a single sleek-looking device. Dr. J and her daughter Ella will talk about the first e-cigs that look like cigarettes, to box mods that are popular among "cloud chasers", to pod-based devices, and what kind of products are emerging and popular today.