Danny Lennon
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Discussions about the science of nutrition, dietetics and health. The podcast that educates through nuanced conversations, exploring evidence and cultivating critical thinking. Hosted by Danny Lennon.
Based on 6 episodes we listened to · September 2026
Danny Lennon makes nutrition research usable by tracing claims through study design, effect size, uncertainty, and real-world constraints.
Sigma Nutrition Radio takes nutrition claims apart at the level where confidence is earned: study design, effect size, exposure, adherence, and the limits of what the evidence can establish.
Danny Lennon and Alan Flanagan make a 1.03 hazard ratio earn its place in your worries.
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Short reviews from the PlayNext desk, based on the episodes we processed.
A careful, chemistry-first clarification of a nutrition debate that often gets flattened.
It takes a careful pass through the seed-oil debate by separating labels that often get lumped together. Rather than treating seed oils as one blunt claim, it draws a line between polyunsaturated fats, omega-6 fatty acids, and linoleic acid, while keeping oxidation in view.
A measured look at choline, neurodiversity, and how far the evidence can go.
Sigma Nutrition Radio takes on a narrow but important question: what choline, and nutrition more broadly, can say about neurodevelopment, ADHD, dyslexia, autism spectrum condition, and where the evidence stops.
A careful look at a headline-grabbing nutrition claim, with the methods kept front and center.
It stays with maternal diet, child neurodevelopment, and the line between association and conclusion, and it handles that ground with unusual care.
A careful look at why losing weight and keeping it off are not the same problem.
This episode treats weight loss maintenance as a real-life problem, not a slogan. What makes it work is the focus on the ordinary friction points that decide whether a plan lasts: how food gets prepared, who is in the house, work, community, grocery access, and budget.
A careful dismantling of detox claims that values exposure, evidence, and plain risk logic.
Detoxification protocols get taken apart here with the sort of methodical skepticism Sigma Nutrition does best. The episode treats “toxins” as a vague umbrella claim, then slows down to ask two cleaner questions: what is the exposure, and what is the intervention really doing?
A careful discussion of emulsifiers that stays close to the evidence and leaves room for a short restriction trial.
The episode keeps its focus on emulsifiers as a food-supply question and does not overstate what the evidence can prove. Danny Lennon and Dr. Alan Flanagan treat the observational signals carefully, note that the effect sizes are modest, and point out that a hazard ratio near…
A careful look at zinc status, measurement, and diet context.
The discussion treats zinc as more than a supplement trend and instead as a matter of status, measurement, and biological consequence. Professor Emily Ho and Danny Lennon keep the focus on the line between insufficiency and deficiency, while also showing why zinc status is hard…
A measured look at how financialization reshapes food security and who ends up paying for it.
Professor Martin Caraher treats food as a financial system and then pulls the frame back to public health and policy. The episode follows how financialization shapes global food security, where money goes, and how speculation can push prices around when food is treated as a…
Shawn Stevenson interviews researchers and coaches on nutrition, sleep, hormones, and fitness.
Supplement labels, decoded with conviction.
Practical health conversations for reducing overwhelm.
This episode explores the challenges and processes of implementing effective public nutrition policies, featuring an interview with Emily Callahan to discuss research translation, barriers, and examples from the US and globally.
This episode features an interview with neurologist Dr.
This episode examines the scientific evidence linking unprocessed red meat consumption to diabetes and cardiovascular disease risks, featuring expert analysis from Gil Carvalho and Mario Kratz.
This episode features an interview with Dr.
This episode explores whether the nutrient density of crops has declined over time, examining evidence from agriculture and public health with expert Dr.
This episode explores the decline of true domain expertise in nutrition and health, discussing cultural factors that make it difficult to distinguish credible information from misinformation.
This episode examines the reliability of industry-funded nutrition studies and introduces a new research project on breakfast's metabolic effects.
This episode examines the complex relationship between vitamin A intake and bone health, exploring both potential risks of excessive retinol and hypothesized benefits of appropriate amounts.
This episode explores the historical context and evidence around dietary fat, cholesterol, and heart disease risk, based on an interview from another podcast.
This episode features an interview with Dr.
This episode features an interview with obesity specialist Dr.
This episode explores why omega-3 supplementation trials show mixed results, using it as a case study to teach broader principles for interpreting scientific evidence in nutrition.
This episode explores the scientific evidence behind creatine's potential benefits for brain health, from cognitive enhancement to neurological disease prevention, featuring an interview with Professor Eric Rawson.
This episode features an interview with Professor Lewis Gough discussing the mechanisms, evidence, and practical applications of sodium bicarbonate supplementation for enhancing sports performance.
This episode explores the fundamental aspects of human energy expenditure, including how calories are burned, regulation mechanisms, adaptation to exercise, and implications for health, weight management, and performance.
This episode discusses the recently published UPDATE trial in Nature Medicine, which compares the effects of ultra-processed versus minimally processed diets within a healthy dietary pattern, featuring lead author Dr.
This episode explores how social psychology influences health and nutrition beliefs, including susceptibility to misinformation, through an interview with researcher Dr.
This episode discusses the scientific evidence and debates around ultra-processed foods, drawing from a recent workshop at Wageningen University that examined topics like food processing impacts on health, gut microbiome interactions, and nutrient bioavailability.
This episode explores the current scientific understanding of microplastics and nanoplastics, focusing on their presence in food, water, and air, and their potential impacts on human health with expert Professor Ian Mudway.
This episode features an interview with Professor Jean-Philippe Drouin-Chartier discussing research on how dairy consumption impacts cardiometabolic disease risk, including type 2 diabetes, hypertension, and cardiovascular disease.
This episode explores causal inference in nutrition science, discussing how to answer causal questions in nutrition epidemiology, interpret studies, and improve research methods with epidemiologist Dr.
This episode features an expert panel discussion from an Optum Nutrition event examining whether menstrual cycle syncing claims are supported by scientific evidence.
This episode features an interview with performance nutritionist Daniel Davey discussing how his approach to elite sports nutrition has evolved throughout his career, focusing on helping athletes optimize performance through nutrition coaching.
This episode discusses the ongoing debate about integrating nutrition education into medical training, featuring a medical student who conducted research on the topic.
This episode features Dr.
This episode explores the challenges in defining 'hyper-palatable foods' and examines whether food processing is the core issue, featuring researcher Tera Fazzino's work on objective classification systems.
This episode explores the evidence on dietary fiber intake, its health benefits, and optimal amounts for reducing chronic disease risk, featuring insights from multiple experts.
This episode of Sigma Nutrition Radio discusses the 2025 EAT-Lancet updated report on the Planetary Health Diet and its implications for human health.
Danny Lennon interviews Professor Emily Ho about zinc insufficiency, covering its impact on inflammation, immune function, and aging.
This episode features Dr.
This premium episode of Sigma Nutrition Radio explores the current scientific consensus on antioxidants, addressing what they are and their functions based on a listener's question.
This episode features an interview with Dr.
This episode explores why humans often think poorly by examining cognitive biases, emotional decision-making, and evidence-based reasoning through insights from six experts across nutrition, medicine, sports science, neuroscience, sociology, and physics.
This episode previews a premium Sigma Nutrition Radio episode where host Danny Lennon reviews key insights from past interviews with guests over the year.
This episode explores whether chronotypes are genetically fixed or can be changed, and discusses their implications for health, nutrition, and metabolism.
This episode examines the evidence behind popular claims about zone 2 training for health benefits, featuring Professor Brendon Gurd discussing a recent review paper on the topic.
This episode features an interview with Dr.
Danny Lennon explores the science of inflammation, distinguishing between acute and chronic types, and examines how diet impacts chronic inflammation, debunking common myths and highlighting evidence-based connections to health.
Danny Lennon interviews Tara Schmidt, a registered dietitian at the Mayo Clinic, about weight loss maintenance and the role of GLP-1 receptor agonists in obesity treatment.
Danny Lennon critically examines detoxification protocols, debunking common quackery claims about environmental toxins and liver detox pathways.
Danny Lennon explores the debate over whether seed oils cause inflammation and chronic disease, discussing claims about linoleic acid, oxidation, and mechanistic evidence.
Danny Lennon and Dr.
Danny Lennon interviews Dr.
Danny Lennon and Dr.
This episode explores the nuanced debate on optimal protein intake for health, examining claims from high-protein advocates and RDA supporters with expert guests.
Danny Lennon interviews Dr.
Dr.
This episode examines whether protein's reputation for suppressing appetite is overstated, exploring historical research, mechanisms like diet-induced thermogenesis, and factors such as energy density.
In this episode, host Danny Lennon interviews Professor Martin Caraher about the financialization of the food system, where speculators gamble on food commodities for profit, exacerbating global food insecurity and inequality.
Danny Lennon answers a subscriber question about the biochemical mechanisms of weight loss, explaining how fat is mobilized from cells, oxidized for energy, and whether this process increases cardiovascular risk.
This episode discusses dietary management of gallstones and gallbladder conditions, including post-surgery recommendations.
The host thanks listeners for feedback on the 600th episode and 12th anniversary, sharing stories of how the podcast has impacted careers in nutrition.
An interview with Dr.
Interview with health psychologist Professor Jane Ogden about eating behaviors and health psychology.
A preview episode compiling expert insights on sleep quality, optimal sleep conditions, and sleep architecture from past interviews.
Danny Lennon and Dr.
Danny Lennon and Dr.
Interview with Dr.
This episode discusses the causes, mechanisms, risks, and treatment options for hypertension, including medications and lifestyle changes, with cardiologist Dr.
Danny Lennon announces a new course on interpreting nutrition research and discusses its value.