Sigma Nutrition Radio:  Evidence-Based Nutrition | Fitness | Health | Dietetics | Body Composition-logo

Sigma Nutrition Radio: Evidence-Based Nutrition | Fitness | Health | Dietetics | Body Composition

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Sigma Nutrition Radio provides unbiased, evidence-based information on nutrition and related areas through interviews with academic researchers, world-class coaches and athletes.

Sigma Nutrition Radio provides unbiased, evidence-based information on nutrition and related areas through interviews with academic researchers, world-class coaches and athletes.
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Sigma Nutrition Radio provides unbiased, evidence-based information on nutrition and related areas through interviews with academic researchers, world-class coaches and athletes.




#303: Brad Dieter, PhD - How Do We Tackle Type 2 Diabetes & Lifestyle-related Chronic Disease?

Brad is a trained Exercise Physiologist, Molecular Biologist, and Biostatistician. He completed his a post-doctoral fellowship in translational science at Providence Medical Research Center, where he studied how metabolism and inflammation regulate molecular mechanisms disease and is involved in discovering novel therapeutics for diabetic complications. His research career has spanned the translational spectrum utilizing basic science, human trials, and machine learning in large data sets...


#302: Leonie Heilbronn, PhD – Alternate-Day Fasting, Early Time-Restricted Feeding & Caloric Restriction

Associate Professor Leonie Heilbronn is the leader of the Obesity and Metabolism group based at the University of Adelaide, Australia. She has a sustained record of translating basic discoveries in nutrition to humans and has contributed to current concepts of caloric restriction (CR), intermittent fasting (IF) and time restricted eating (TRE) in humans. She is keenly interested in understanding mechanisms of insulin resistance in skeletal muscle and in adipose tissue utilising nutritional...


#301: John Berardi, PhD - Tribalism in Nutrition

John Berardi, PhD is best known as the co-founder of Precision Nutrition. He is also the founder of Change Maker Academy, which is devoted to helping people turn their passion for health and fitness into a successful career. Over the last 15 years he has advised Apple, Equinox, Nike, and Titleist, as well as the San Antonio Spurs, Carolina Panthers, US Open Champ Sloane Stephens, and 2-division UFC Champ Georges St. Pierre. Show notes:


#300: The Random Episode

Sigma Nutrition Radio has reached the 300th episode! To mark the occassion, Patreon supporters of the podcast and subscribers to the Sigma Synopsis email were able to submit questions about anything they wished. In this episode, Gar Benn joins me to go through some of the questions submitted. This episode focuses on all the random questions submitted about a range of things, from my schedule to religion to career highlights to living in Ireland, and everything in between!


#299: Mark Hopkins, PhD – Compensatory Eating, Exercise-induced Weight Loss & Energy Balance Homeostasis

Dr. Mark Hopkins is a lecturer in nutritional physiology at the University of Leeds, UK. His research focuses primarily on the physiological mechanisms of appetite control, and the interaction between diet, physical activity and appetite control. This includes examining the physiological and behavioural responses to dietary and exercise-induced weight loss. Mark is a member of the Association for the Study of Obesity, the British Association of Sport & Exercise Science and The Nutrition...


#298: David Zeevi, PhD – Genes of Gut Microbes & Inter-Individual Variation in Glucose Response

David Zeevi is an independent research fellow at Rockefeller University in New York. His current work focuses on developing computational methods for studying microbial ecology in the human gut and in the marine environment, and its contribution to human and environmental health. Previously he completed his PhD at the Weizmann Institute of Science in Israel under Prof. Eran Segal, studying the human microbiome and its effect on host health and personalized nutrition. He was lead author on...


#297: Cliff Harvey, PhD – Carbohydrate-Restriction, Ketosis & Neuroprotection

Cliff Harvey has a PhD in Nutrition from Auckland University of Technology (AUT), with his research focus being on ketosis, ketogenesis, and individual responses to diet. His research interests include MCTs, keto-induction, “keto-flu”, and finding appropriate carbohydrate intake for individuals based on their metabolic state, activity and ethno-genetic factors. He is a Registered Clinical Nutritionist in New Zealand, with over 20 years of experience as a practitioner. Cliff was one of the...


#296: Alan Flanagan – Circadian Entrainment, Chronotypes & Chrononutrition

Alan Flanagan is currently a PhD researcher at the University of Surrey, UK. His research is in the general field of chrononutrition, with a specific focus on how calorie distribution and timing may impact health & energy balance. Alan has a Masters in Nutritional Medicine, also from the University of Surrey. Alan is also a qualified lawyer, practising in Dublin, Ireland before embarking on his PhD. SHOW NOTES:


#295: Ben House, PhD – How Much of a Surplus Do Advanced Lifters Need for Optimal Muscle Gain?

Ben House has a Ph.D. in Nutrition from the University of Texas at Austin. Ben has worked as a Strength and Conditioning Coach and Nutritionist since 2006. He is currently the owner and founder of Functional Medicine Costa Rica, where he hosts courses, mentorships and retreats. House has numerous publications in peer reviewed scientific journals such as The International Journal of Obesity, has presented his work at multiple international conferences, and lectures regularly on health and...


#294: Nicola Guess, PhD, RD - Prediabetes & Type 2 Diabetes Nutrition

Nicola Guess is a Registered Dietitian with a PhD in the dietary management of prediabetes from Imperial College London. She is currently Head of the Nutrition Unit at Dasman Diabetes Institute (DDI) in Kuwait. Nicola is a research fellow at King’s College London where her research focuses on the role of diet in the prevention and management of type 2 diabetes. She has a particular interest in the use of low-carbohydrate diets in the management of type 2 diabetes, and leads a research...


#293: Jessica Setnick, RD – Orthorexia: Positive vs. Pathological Nutrition

Jessica Setnick background in human behavior (she holds a Bachelor’s degree in Anthropology from The University of Pennsylvania) combined with her expertise in dysfunctional and disordered eating (she is a Registered Dietitian with a Master’s Degree and writes books and articles about eating disorders). A Certified Eating Disorder Dietitian and CEDRD Supervisor, Jessica is the author of The Eating Disorder Clinical Pocket Guide and Eating Disorders Boot Camp. She is a co-founder of IFEDD,...


#292: Prof. Alexandra Johnstone, PhD – Appetite Control, Satiety & Diet Interventions

Prof. Alexandra Johnstone is recognized as a leading innovative UK researcher within the field of human appetite control and specifically, the role of dietary protein. She is a Professor at The Rowett Institute at the University of Aberdeen in Scotland. She has published an extensive list of studies to assess the impact of diets on the body and the mind and to investigate how different meals and drinks affect our appetite, health and wellbeing. SHOW NOTES:...


#291: Gab Fundaro, PhD – Gut Microbiome, Bacterial Diversity & the Impact of Diet & Probiotics

Dr. Gabrielle Fundaro is a coach and science communicator for Renaissance Periodization coach. Dr. Fundaro is a former Assistant Professor of Exercise Science at Georgia Gwinnett College, and holds a PhD in Human Nutrition. In This Episode We Discuss: - Bacertial diversity: eveness & richness - What is an “optimal” gut microbiome composition - How rapidly does it change on changing diet? - Relationship between microbiome and disease states: which way around does this occur? SHOW NOTES:...


#290: Menno Henselmans & Eric Helms, PhD - Diet Breaks, Calorie Cycling & Muscle Retention

In This Episode We Discuss: 1) How low is “too low” for low calorie days?; 2) How much do very low calorie days or fasting impact muscle retention?; 3) Is there a physiological benefit to diet breaks and refeeds? Eric is currently a Research Fellow at Auckland University of Technology, New Zealand. His work is focused on training and nutrition interventions that could have implications for bodybuilders, powerlifters and other strength athletes. Eric has many peer reviewed publications and...


#289 Ciaran Fairman, PhD – Exercise Interventions in Cancer Treatment

Ciaran is a post-doc research fellow at the Exercise Medicine Research Institute (EMRI) at Edith Cowan University in Western Australia. Ciaran completed his PhD in the Exercise and Behavioral Medicine Laboratory at The Ohio State University under the mentorship of Dr. Brian Focht. Here, his research focused on the physiological and psychosocial responses to physical activity lifestyle interventions in a variety of clinical populations including breast and prostate cancer, and individuals...


#288: Ted Ryce: Meditation, Communication & Understanding Behaviours

Ted is an online coach and podcaster. He has been in the fitness industry for over 20 years, with much of that spent as a sought-after personal trainer in Miami, Florida. During his coaching career he has worked with a variety of clients including Fortune 500 CEOs and celebrities, including Richard Branson and Robert Downey Jr. In more recent years he has continued to coach people online whilst being based in several different locations around the world. Show notes:...


#287: Gregg Slater - Dietary Fatigue, Nutrition Periodization & the Deficit-Adherence Model

Gregg Slater is head of education at Lift The Bar, a company providing education to fitness professionals. After completing his BSc in Sports and Exercise Science Gregg started out his professional life as a Physical Education Teacher before making the transition towards his passion for fitness as a Physical Training Instructor in the Royal Air Force for 10 years. In 2015 he took up his role as Head of Education for Lift The Bar. Over this time Gregg has designed a number of acclaimed...


#286: James Morton, PhD - Fuelling Elite Sport: Team Sky, Liverpool FC & Carbohydrate Periodization

Dr. James Morton is a Professor of Exercise Metabolism at Liverpool John Moores University. He has an extensive list of published peer-review research in high impact journals, as well as being deeply involved in the highly-regarded sport science and nutrition programs at LJMU. James was Head of Nutrition at Team Sky (now Team Ineos) during a period where the team captured 5 Tour de France titles. Previously, Dr. Morton worked as head performance nutritionist at Liverpool Football Club. He...


#285: What is Health? A Conceptual Framework

Intro to Danny’s framework for defining “health”: 1) Physical Reality – 06.30; 2) Contentedness – 14.08; 3) Psychological Framework – 31.37 DUBLIN SEMINAR: SHOW NOTES:


#284: Simone Harding – Tackling Negative Body Image & Weight Stigma

Simone is an Intuitive Eating Counsellor, currently finishing MSc Nutrition and Behaviour at Bournemouth University. She is also a PhD Counselling psychology candidate. Her academic research area is body image and adaptive eating, and she practices as a therapist in the field of nutrition, chronic dieting, body image and eating disorders. In This Episode We Discuss The scale of the problem of negative body image Tying appearance to self-worth & personal identity External drivers of...