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PODCAST

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.

health & fitness nutrition

All Episodes

48:31

#394: Gar Benn – Nutrition Coaching Q&A

Sigma Nutrition Radio ·

2021/07/09

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). Show notes at sigmanutrition.com/episode394/

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01:22:42

#393: Vitamin D: Does Supplementation Actually...

Sigma Nutrition Radio ·

2021/06/29

Click here to subscribe to Sigma Nutrition Premium 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:

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48:16

#392: Clare Pettinger, PhD, RD – Environmentally...

Sigma Nutrition Radio ·

2021/06/22

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 sustainable diets for nutrition professionals and Allied Health Professioinals.

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01:05:36

#391: Is There a Body Weight Set Point?: Models of...

Sigma Nutrition Radio ·

2021/06/15

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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51:29

#390: Gil Carvalho MD, PhD – Dairy, Olive Oil & Diet...

Sigma Nutrition Radio ·

2021/06/09

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 discuss: Dairy: is it over-emphasized in the Dietary Guidelines for

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49:46

#389: Renee McGregor, RD – Why Are Athletes...

Sigma Nutrition Radio ·

2021/06/04

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 performance nutrition, including, Olympic, Paralympic and

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01:16:38

#388: Consequences of Weight Stigma and Weight Bias

Sigma Nutrition Radio ·

2021/05/27

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 this episode at sigmanutrition.com/episode388 If you wish to support the

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01:12:30

#387: Shift Work and Health

Sigma Nutrition Radio ·

2021/05/18

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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58:45

#386: Deirdre Tobias, ScD – Study Design, Diet...

Sigma Nutrition Radio ·

2021/05/12

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 research focuses on identifying lifestyle risk factors and underlying

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01:17:27

#385: Insulin Resistance & Diet

Sigma Nutrition Radio ·

2021/05/04

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 in tissues other than fat tissue, such as the liver, skeletal muscle,

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44:11

#384: Research Review: The Interference Effect &...

Sigma Nutrition Radio ·

2021/04/27

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 subscription by visiting sigmanutrition.com/mass-sale/

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01:33:49

#383: Irritable Bowel Syndrome (IBS) & Diet

Sigma Nutrition Radio ·

2021/04/20

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] Show notes available at sigmanutrition.com/episode383

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50:19

#382: Andy Morgan – Practicalities of Body...

Sigma Nutrition Radio ·

2021/04/06

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 this episode at: sigmanutrition.com/episode382

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01:14:42

#381: Prof. Chris Packard – LDL Cholesterol, ApoB &...

Sigma Nutrition Radio ·

2021/03/30

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 sigmanutrition.com/episode381

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48:39

#380: Prof. Barry Popkin – The Nutrition Transition &...

Sigma Nutrition Radio ·

2021/03/23

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 obesity and other nutrition-related noncommunicable diseases (NCD). Prof

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01:17:34

#379: Obesity & Chronic Disease Risk with Dr. Spencer...

Sigma Nutrition Radio ·

2021/03/16

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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01:17:29

#378: Nutritional Epidemiology

Sigma Nutrition Radio ·

2021/03/09

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 into an understanding of an overall body of evidence. Show notes:

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48:49

#377: Herman Pontzer, PhD – Metabolism, Mitochondria...

Sigma Nutrition Radio ·

2021/03/02

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-gatherers in northern Tanzania, fieldwork on chimpanzee ecology in the

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51:44

#376: Kevin Hall, PhD – Plant-based Diet vs....

Sigma Nutrition Radio ·

2021/02/23

Dr. Kevin Hall, PhD is Senior Chief of the Integrative Physiology Section of the Laboratory of Biological Modeling at the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). His laboratory investigates how metabolism and the brain adapt in response to a variety of interventions to diet and physical activity. They carry out studies to better understand the complex mechanisms regulating macronutrient metabolism, body composition, and energy expenditure. Recently Dr. Hall was lead

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01:43:56

#375: Salt, Sodium & Health

Sigma Nutrition Radio ·

2021/02/16

In this episode Danny and Alan discuss the current evidence base related to sodium intake and health, most notably cardiovascular disease. The episode walks through understanding diet-disease relationships, the epidemiology of sodium and health outcomes, the reasons for conflicting conlusions, sodium measurements in research, intervention trials, and more. Importantly, the claim that the sodium-CVD risk relationship exhibits a "J-shaped curve" (i.e. risk is low at moderate intakes and higher at both

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