Sigma Nutrition Radio

Sigma Nutrition Radio

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.

Episodes

July 20, 2021 35 min

Dr. Leigh Frame, PhD is Director of Integrative Medicine at George Washington School of Medicine and Health Sciences in Washington DC. Dr. Frame received her PhD in Human Nutrition, as well as a Master of Health Science degree in Molecular Microbiology and Immunology, from the Johns Hopkins Bloomberg School of Public Health.

In this episode we discuss a range of topics including: the role of placebo groups and the different types w...

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Professor le Roux is an expert in metabolic medicine and is currently a Professor of Experimental Pathology, University College Dublin. He is recognised as a world leader in metabolism and obesity.

Professor le Roux’s clinical focus is in the management of Type 2 diabetes, pre-diabetes, obesity, cardiovascular risk and other metabolic disorders. Professor Carel le Roux has been published extensively and currently holds a number of ...

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Gar Benn is the Head of Coaching at Sigma Nutrition, where he works with nutrition coaching clients and oversees the coaching services.

He is the owner of CityGym Limerick, a powerlifting-centric gym in Ireland. And he is also the co-founder of the European Powerlifting Confernce and Titan Ireland.

Gar is a qualifed nutrition coach and has completed courses in Motivational Interviewing and Acceptance and Commitment Therapy (ACT).

S...

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Vitamin D status is linked to a variety of health outcomes, and avoiding or correcting deficiency is important. However, does supplementing with vitamin D actually benefit most people? Is there evidence for supplementation improving health outcomes like mortality, cancer risk, depression or other outcomes? In this episode Danny and Alan look at intervention trials of vitamin D supplementation.

Show notes available at: sigmanutritio...

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Dr. Clare Pettinger is a Registered Dietitian, Public Health Nutritionist and experienced educator. Dr. Pettinger publishes research in the public health nutrition field, and lectures at the Universtity of Plymouth, UK. 

Dr. Pettinger is actively engaged in community-focussed research around food systems, poverty and social justice. She is an enthusiastic 'sustainability advocate' involved in promoting environmentally susta...

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In this episode Danny and Alan discuss the three primary models used to explain body mass regulation: 1) Set Point Model, 2) Settling Point Model, 3) Dual Intervention Model. They discuss the role of feedback systems, environment, behaviour, as well as discussing both the "thrifty gene hypothesis" and John Speakman's "drifty gene hypothesis".

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Gil Carvalho, MD PhD is a medical doctor, research scientist, science communicator. Dr. Carvalho trained as a medical doctor in the University of Lisbon, in his native Portugal, and later obtained a PhD in Biology from Caltech (California Institute of Technology). He has published peer-reviewed medical research spanning the fields of genetics, molecular biology, nutrition, behaviour, aging and neuroscience.   In this episode we d...
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    Renee McGregor is a leading sports dietitian, specialising in Eating Disorders, REDs, The Female Athlete, athlete health and performance.

    She is regularly asked to work directly with high performing and professional athletes that have developed a dysfunctional relationship with food that is impacting their performance, health and career. Her practice and knowledge is supported by extensive experience of working in both clinical and...

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    Danny & Alan discuss the current evidence on the health consequences and societal consequences of weight stigma and weigh bias. This includes implicit bias, explicit bias, and internalization of bias. What evidence do we currently have? And what questions remain unanswered?

    Segments:

    Today's Topic in Focus [03:39] Listener Questions  [59:48] Quack Asylum [68:55] Random Recommendations [72:07]

    You can find the show notes to ...

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    May 18, 2021 72 min

    In this episode Danny and Alan discuss the relationship between shift work and health. Why does shift work have negative health impacts? How can one mitigate circadian misalignment? How does shift work impact nutrient metabolism? What nutrition, sleep and lifestyle strategies can help shift workers? 

    Show notes at: sigmanutrition.com/episode387

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    Dr. Tobias is a nutrition and obesity epidemiologist at the Brigham and Women’s Hospital and Harvard Medical School in Boston, MA. She received doctoral and postdoctoral training from the Harvard TH Chan School of Public Health, Boston, MA, under mentor Dr. Frank B. Hu.

    Dr. Tobias is co-Instructor of Nutrition Epidemiology with Dr. Walter Willett and faculty member at the Harvard TH Chan School of Public Health. Her epidemiologic r...

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    May 4, 2021 77 min

    In this episode we explore the causes of insulin resistance, and the dietary modifications that may help those with insulin resistance.

    We discuss how insulin resistance is a complex metabolic disorder, that goes beyond one single pathway or cause. There is also a discussion on the mechanisms of insulin resistance pathogenesis. Specifically, we talk about the accumulation of ectopic fat. Ectopic fat is the storage of triglycerides ...

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    In this episode Greg Nuckols and Mike Zourdos breakdown two research papers related to the interference effect and concurrent training. 

    Greg and Mike (along with Eric Helms and Eric Trexler) produce the MASS research review, which breaks down the latest research studies relevant to those interested in strength training, strength sports, and bodybuilding. 

    From April 27th to May 4th you can get a significant discount on a MASS subs...

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    In this episode Danny and Alan discuss irritable bowel syndome and the evidence related to dietary interventions. They discuss diagnosis of the condition, various sub-types, potential mechanisms, the gut-brain axis, first line treatments, impact of fibre, and evidence on the low FODMAP diet.

    Today's Topic in Focus: IBS & Diet [06:20]

    "I Have a Question!" [74:47]

    Quack Asylum [79:30]

    Random Recommendations [86:49]

    Sh...

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    Andy Morgan is the founder of RippedBody.com and an online coach. He co-authored the Muscle & Strength Pyramids books along with Dr. Eric Helms and Andrea Valdez. He has published a host of excellent nutrition and training resources in the form of ebooks, articles and podcasts, which can be found on the Ripped Body website. He recently released the third edition of the Diet Adjustments Manual.

    You can find the show notes to thi...

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    Prof. Chris Packard holds an Honorary Professorship of Vascular Biochemistry at the University of Glasgow. Over his career, Professor Packard has focussed on two aspects of atherosclerosis research, lipoprotein metabolism and how it is affected by diets and drugs, and large-scale clinical trials of lipid lowering agents. He is acknowledged as one of the leading researchers in the world in this field.

    Show notes available at sigmanu...

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    Prof. Barry Popkin is the W.R. Kenan Jr. Distinguished Professor of Nutrition at the University of North Carolina at Chapel Hill. He is a nutrition and obesity researcher at the Carolina Population Center and is the director of the Interdisciplinary Center for Obesity at UNC.

    He developed the concept of the Nutrition Transition, the study of the dynamic shifts in dietary intake and physical activity patterns and trends around obesi...

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    Danny and Alan are joined by Dr. Spencer Nadolsky. Dr. Nadolsky is a board-certified obesity specialist, lipidologist, and family physician.

    In this episode we discuss the strengths and limitations of BMI, adipose tissue type and relevance to risk, hypertrophic vs. hyperplastic adipocytes, 'Metabolically Healthy Obesity', and weight stigma.

    Show notes available at sigmanutrition.com/episode379

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    March 9, 2021 77 min

    In this episode Danny and Alan discuss some critical aspects to understand about nutritional epidemiology in order to evaluate diet-disease relationships appropriately. Of particular focus in this episode is the unique exposure of interest in nutrition studies, why its crucial to understand temporal relationships and how to think about relative risk and absolute risk. The guys finish by explaining how one can include these findings...

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    Herman Pontzer, PhD is an Associate Professor of Evolutionary Anthropology at Duke University and Associate Research Professor of Global Health at the Duke Global Health Institute. He is an internationally recognized researcher in human energetics and evolution.

    Over two decades of research in the field and laboratory, Dr. Pontzer has conducted pathbreaking studies across a range of settings, including fieldwork with Hadza hunter-g...

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