Sigma Nutrition Radio

Danny Lennon

Nutrition Science

Cardiovascular Disease

Nutrition

Ultra-Processed Foods

Public Health

Cholesterol

Cardiovascular Health

Obesity

Performance Nutrition

Sports Nutrition

Mental Health

Chronic Diseases

Eating Disorders

Gut Microbiome

Dietary Fiber

Omega-3 Fatty Acids

Nutrition Research

Mediterranean Diet

Dietary Patterns

Inflammation

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.

1.4k ratings

Publishes	Weekly	Episodes	647	Founded	13 years ago
Number of Listeners		Categories	NutritionHealth & Fitness

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Latest Episodes

#624: Can Athletes Eat for Performance and the Planet? – Peter Res

Can an athlete reduce the environmental impact of their diet while still meeting the demands of training, competition and recovery? Peter Res argues that these aims can be compatible, provided dietary changes are planned around the athlete's needs.

Yesterday • 36 min

#623: Testosterone Testing: What Do the Results Mean? When Does TRT Help? – Austin Baraki, MD

Men commonly feel that if their testosteone isn't "optimized" and high, they are missing out on greater health in a variety of ways. But what can a testosterone result actually tell us? How can results be interpreted with appropriate nuance that is n... more

13 Oct 2026 • 1 hr 8 min

#622: Body Composition Testing: Methods & Interpretation – Prof. Grant Tinsley

Body composition testing is widely used in research, sport and clinical practice. But what are these methods actually measuring, and how much confidence should we place in the numbers they produce?

In this episode, we examine the assumptions behind... more

6 Oct 2026 • 1 hr 4 min • Most popular

#621: Hedonic Overeating, Food Wanting and Impact of Perception – Prof. Graham Finlayson

Why do some foods feel difficult to stop eating, while others can be highly enjoyable without prompting the same tendency to overconsume? Answering this requires a clearer understanding of food reward, including the distinction between liking a food,... more

22 Sep 2026 • 42 min

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Recent Guests

Grant Tinsley

Professor of Human Performance at Texas Tech University, Director of the Energy Balance and Body Composition Lab

Texas Tech University; Vineyard Health (Chief Science Officer)

Episode: #622: Body Composition Testing: Methods & Interpretation – Prof. Grant Tinsley

Graham Finlayson

Professor of Psychobiology, University of Leeds

University of Leeds

Episode: #621: Hedonic Overeating, Food Wanting and Impact of Perception – Prof. Graham Finlayson

Jordan Feigenbaum

Founder of Barbell Medicine

Barbell Medicine

Episode: #620: BPC-157 and Peptide Medications: What Do We Know? – Jordan Feigenbaum, MD

Nick Tiller

Exercise science researcher and science communication advocate

The Health and Wellness Lie author, nbTiller.com

Episode: #618: How Wellness & Optimisation Culture Can Commodify Science – Nick Tiller, PhD

Gemma McGuinness

Performance nutritionist, co-founder of Verus Performance

Verus Performance

Episode: #617: What Does Effective Athlete Support Look Like in Practice? – Gemma McGuinness

Austin Baraki, MD

Physician, co-founder of Barbell Medicine

Barbell Medicine

Episode: #616: More Testing, Better Health? Harms of Overdiagnosis & Overtreatment - Austin Baraki, MD

Alysha Thompson

Lead author of the discussed paper; Research fellow at the Co-Centre for Sustainable Food Systems, Queen's University Belfast

Queen's University Belfast

Episode: #615: Why Processing Doesn't Determine the Healthfulness of Plant-Based Diets – Alysha Thompson, PhD

Krista Scott-Dixon

Nutrition coach, educator, author of a behavior-change textbook

Precision Nutrition (former), Author of Steal This Coaching

Episode: #614: The Human Skills of Nutrition Coaching – Krista Scott-Dixon, PhD

Giulia Guerrini

Registered pharmacist; researcher at Examine; safety lead for Supplement Navigator

Examine

Episode: #613: Supplement Safety & Medication Interactions – Giulia Guerrini, MPharm

Host

Danny Lennon

Host of Sigma Nutrition Radio

Reviews

4.9 out of 5 stars from 1.4k ratings

Great speakers but lack scientific humility
Great discussions from leading experts but sadly fail to demonstrate the humility needed as true scientists. The scientific method requires constant evaluation and at any time will be only partially “correct” representation of the truth.. They weaken their stance by suggesting they are the only source of truth, whilst failing to understand the wider role of food in people’s lives.
Apple Podcasts
2
MedicalPodder
United Kingdom10 months ago
Mmm
I have not lissoned to this so bast on the reviews
Apple Podcasts
4
Uam a monkey
United Kingdoma year ago
Reliable + Evidence Based
Evidence based, nuanced, no hype. Expert interviews, deep dives, detailed and clear explanations. My go-to source for all nutrition questions. Having listened to well over 100 episodes, Sigma has easily become my favorite podcast. Danny is an exceptional interviewer, and he and Alan have a talent for cutting through the confusion to tease out what the science really shows (and how/why). I’ve grown in careful, critical thinking in all spheres of life. Highly recommend.
Apple Podcasts
5
JJSchroeder
United Statesa year ago
👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲
👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲👩🏻‍🦲💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💅🏼💴💴💴💴💴💴💴💴💴💴💴💴💴💴🏆🏆🏆🏆🏆🏆👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻✌🏻✌🏻✌🏻✌🏻✌🏻✌🏻✌🏻✌🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻
Apple Podcasts
5
#DowntonAbbeyfan!
United Kingdoma year ago
Low Carb Denialists
Flanagan has a blind hatred of people who regain their health an quality of life by adopting a low carb diet.
Apple Podcasts
1
Combination Lock
Australia2 years ago

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Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Many say it helps develop careful, critical thinking about nutrition claims.

Listeners praise evidence-based rigor and guests' expertise.

Some criticisms note the hosts' perceived arrogance or certainty at times.

Listeners frequently value practical, research-informed coaching insights.

Premium content and thorough study explanations are appreciated by long-time fans.

Chart Rankings

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

Apple Podcasts	#51	United States/Health & Fitness/Nutrition
Apple Podcasts	#8	United Kingdom/Health & Fitness/Nutrition
Apple Podcasts	#13	Canada/Health & Fitness/Nutrition
Apple Podcasts	#208	Canada/Health & Fitness
Apple Podcasts	#210	United Kingdom/Health & Fitness
Apple Podcasts	#47	Australia/Health & Fitness/Nutrition

Talking Points

Recent interactions between the hosts and their guests.

#620: BPC-157 and Peptide Medications: What Do We Know? – Jordan Feigenbaum, MD

Q: How should a consumer approach the decision to use peptide medications given the current evidence gap and access issues?

Consumers should engage in a thorough risk-benefit analysis with a clinician, consider the uncertainty in evidence, understand sourcing risks (purity, dosing, monitoring), and prioritize information from trusted medical sources rather than anecdotes or influencer rhetoric.

#620: BPC-157 and Peptide Medications: What Do We Know? – Jordan Feigenbaum, MD

Q: What is the typical evidential standard you would require for a peptide drug to be considered safe and efficacious?

In general, a robust evidence base from randomized controlled trials, clear safety characterization, dose-ranging data, and comparison to placebo are needed. For newer peptides like BPC-157, such data are largely absent, making confidence in safety and efficacy low.

Fiber: Independent Benefits or Just a Proxy for Healthy Foods?

Q: Roy asks about exposure frequency versus total dose for red meat and whether spreading intake over days versus concentrating it in meals changes risk, and how to interpret epidemiological exposure data.

The responders emphasize total exposure as a primary consideration, citing population studies and the Alberta Tomorrow Men's Study to illustrate how varying intake levels relate to risk, while cautioning that misinterpretations can arise from how exposure is categorized. They stress that understanding exposure distribution is important but that total intake often remains a strong predictor of risk, with context from food sources and overall dietary patterns influencing the interpretation.

Fiber: Independent Benefits or Just a Proxy for Healthy Foods?

Q: Sam asks whether the health benefits attributed to fiber could be explained by fiber being a proxy for fruit, vegetable, legume, and whole grain intake, rather than fiber itself, and how to parse this in research.

The panelists explain that while there are independent associations for fiber and for the foods that contain it, isolating fiber's effects is difficult because dietary patterns lead to interrelated exposures. Observational data show fiber and food sources both relate to improved outcomes, yet controlled feeding studies indicate that specific fiber types can have mechanism-based effects (e.g., soluble fiber and cholesterol metabolism). They conclude that fiber likely contributes to benefits, but the exact degree of independent effect varies by context and food source.

#616: More Testing, Better Health? Harms of Overdiagnosis & Overtreatment - Austin Baraki, MD

Q: How would you define the concept of screening and what is the goal of screening essentially?

Screening is the search for an unidentified condition in asymptomatic individuals, aiming to detect disease or risk factors early so that interventions can reduce downstream morbidity and mortality, though this is not guaranteed and depends on the condition and context.

Audience Metrics

Listeners, social reach, demographics and more for this podcast.

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Frequently Asked Questions About Sigma Nutrition Radio

What is Sigma Nutrition Radio about and what kind of topics does it cover?

A rigorous, evidence-centered show that unpacks nutrition science through in-depth conversations with researchers, clinicians, and practitioners. Episodes routinely explore how to interpret research, distinguish hype from data, and apply nuanced findings to real-world eating, coaching, and health decisions. A hallmark is critical thinking about methods, with guests ranging from meta-analysts and pharmacists to sport-nutrition experts and public-health researchers, often tying complex topics like fasting, plant-based diets, microbiome science, and nutrition messaging to practical guidance for professionals and informed listeners alike.

Where can I find podcast stats for Sigma Nutrition Radio?

Rephonic provides a wide range of podcast stats for Sigma Nutrition Radio. We scanned the web and collated all of the information that we could find in our comprehensive podcast database. See how many people listen to Sigma Nutrition Radio and access YouTube viewership numbers, download stats, audience demographics, chart rankings, ratings, reviews and more.

How many listeners does Sigma Nutrition Radio get?

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What are the audience demographics for Sigma Nutrition Radio?

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How many subscribers and views does Sigma Nutrition Radio have?

To see how many followers or subscribers Sigma Nutrition Radio has on Spotify and other platforms such as Castbox and Podcast Addict, simply upgrade your account. You'll also find viewership figures for their YouTube channel if they have one.

Which podcasts are similar to Sigma Nutrition Radio?

These podcasts share a similar audience with Sigma Nutrition Radio:

1. The Proof with Simon Hill
2. Front Page Fitness
3. Iron Culture presented by MASS
4. Barbell Medicine Podcast
5. The Revive Stronger Podcast

How many episodes of Sigma Nutrition Radio are there?

Sigma Nutrition Radio launched 13 years ago and published 647 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

How do I contact Sigma Nutrition Radio?

Our systems regularly scour the web to find email addresses and social media links for this podcast. We scanned the web and collated all of the contact information that we could find in our podcast database. But in the unlikely event that you can't find what you're looking for, our concierge service lets you request our research team to source better contacts for you.

Where can I see ratings and reviews for Sigma Nutrition Radio?

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What guests have appeared on Sigma Nutrition Radio?

Recent guests on Sigma Nutrition Radio include:

1. Grant Tinsley
2. Graham Finlayson
3. Jordan Feigenbaum
4. Nick Tiller
5. Gemma McGuinness
6. Austin Baraki, MD
7. Alysha Thompson
8. Krista Scott-Dixon

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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