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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

48:46

#557: Health Psychology & Eating Behaviour – Prof....

Sigma Nutrition Radio ·

2025/03/25

In the realm of health psychology, our understanding of eating behaviors extends beyond mere physiological hunger cues. Research indicates that factors such as learned associations, cultural influences, and individual perceptions play pivotal roles in shaping our dietary choices. Recognizing this complexity is essential for developing effective dietary interventions that move beyond simplistic recommendations, acknowledging the intricate web of cognitive, emotional, and societal factors at play. A

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22:11

SNP38: What is Quality Sleep?

Sigma Nutrition Radio ·

2025/03/18

Sleep is one of the most critical yet often overlooked components of health, performance, and overall well-being. Poor sleep quality or insufficient sleep can disrupt circadian rhythms, impair glucose metabolism, and alter hunger signals, leading to increased food intake, reduced insulin sensitivity, and other undesirable outcomes. In this episode, we bring together expert discussions from some of the leading researchers in sleep science, to explore what defines high-quality sleep, the mechanisms

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01:06:28

#556: Can We Restore the Gut Microbiome Through...

Sigma Nutrition Radio ·

2025/03/11

There is research suggesting that industrialization has significantly altered the composition of our gut microbiota, with certain microbial species now absent in many industrialized populations. Given the known associations between gut microbiome diversity and health, researchers have begun investigating whether restoring lost microbial species and adopting dietary patterns similar to those of non-industrialized populations could lead to measurable health benefits. In a newly-published study, the

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59:29

#555: What Should the Dietary Guidelines Say? – Prof....

Sigma Nutrition Radio ·

2025/03/04

Every five years, the U.S. Dietary Guidelines are updated based on the latest scientific evidence to help shape national nutrition recommendations. A panel of experts was assembled to review the existing research, evaluate new findings, and provide recommendations that will inform the next edition of the guidelines. One of the committee members involved in this process is Professor Christopher Gardner, a leading nutrition scientist at Stanford University, who joins us to share key insights from the

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01:13:12

#554: Crucial Ideas for Understanding Nutrition Science

Sigma Nutrition Radio ·

2025/02/25

Understanding the complexities of diet-disease relationships requires a nuanced approach to nutritional science. Unlike other scientific disciplines, nutrition research often grapples with the inherent challenges of studying dietary patterns and nutrient intakes in free-living populations over long periods. The cumulative effects of dietary exposures, combined with the necessity to control for confounding factors such as total energy intake and population-specific dietary habits, highlight the need

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40:58

#553: Healthy Habits for Fertility and Reproductive...

Sigma Nutrition Radio ·

2025/02/18

This episode focuses on the intersection of nutrition, lifestyle, and women’s health, with a particular emphasis on managing complex conditions such as PCOS, endometriosis, and premenstrual dysphoric disorder (PMDD). Registered dietitian Marjorie Nolan Cohn shares insights from over two decades of clinical practice, highlighting the importance of addressing foundational health behaviors—such as adequate sleep, hydration, and nutrient-dense dietary patterns—before introducing targeted interventions

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41:04

#552: Diet & Sleep Interactions – Marie-Pierre St....

Sigma Nutrition Radio ·

2025/02/11

Over the past couple of decades, renowned researcher Dr. Marie-Pierre St-Onge has uncovered fascinating links between how we sleep and what we eat, revealing how these two lifestyle factors influence energy balance, cardiovascular health, and metabolic function. In this episode we’ll explore Dr. St-Onge’s findings on sleep regularity and its association with reduced mortality risk, providing actionable insights for optimizing your lifestyle. With a focus on combining rigorous methodologies and

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17:39

Multivitamin Nihilism: Is it Actually Worthless to...

Sigma Nutrition Radio ·

2025/02/04

Multivitamin and multimineral supplements have long been a topic of both scientific inquiry and public debate. While they are often marketed as convenient solutions for achieving nutritional adequacy, their true value remains contentious. Are these supplements essential insurance policies against nutrient deficiencies, or are they merely expensive placebos? Importantly, how should we weigh their potential benefits against the lack of robust evidence for long-term health outcomes such as reduced

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01:02:19

#551: How to Shift from Short-term Dieting to...

Sigma Nutrition Radio ·

2025/01/28

While the fitness industry often emphasizes short-term goals such as rapid weight loss or aesthetic improvements, a growing body of evidence highlights the importance of fostering long-term habits for health and wellbeing. Understanding how psychological frameworks intersect with physical health behaviors is key to empowering clients and overcoming the challenges posed by rigid dieting practices or the influence of social media culture. Bodybuilding and fitness culture serve as both a microcosm and

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53:10

#550: Eating Disorder Risk in Sport, Wellness &...

Sigma Nutrition Radio ·

2025/01/21

Eating disorders and disordered eating behaviors represent complex, multifaceted challenges that affect individuals across all demographics, yet they remain widely misunderstood and under-recognized. These issues often extend beyond the stereotypical images associated with eating disorders, touching everything from rigid “clean eating” obsessions to the normalized extremes of diet culture. At the heart of these behaviors lies a disruption in one’s relationship with food, often fueled by societal

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01:19:25

#549: Are We Doomed? Trust, Misinformation, and the...

Sigma Nutrition Radio ·

2025/01/15

In a world flooded with information, discerning fact from fiction in fitness and nutrition has never been more challenging—or more important. The rise of social media and democratized science has given everyone a platform, but not all voices are equal. How do we navigate a landscape where influencers with massive followings wield the same credibility as seasoned experts? Why do pseudoscientific trends gain traction while nuanced evidence gets lost in the noise? In this episode we also dive into the

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21:56

IGF-1 and Diet: Cause For Concern? (SNP36)

Sigma Nutrition Radio ·

2025/01/08

IGF-1 (Insulin-Like Growth Factor 1) has emerged as a hot topic in health and nutrition discussions, often linked to longevity, cancer risk, and metabolic health. On one hand, IGF-1 is essential for growth, repair, and metabolic regulation; on the other, it is sometimes associated with disease processes, including cancer and cognitive decline. For those intrigued by the intersection of nutrition, biomarkers, and disease prevention, IGF-1 offers an opportunity to explore how science grapples with

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48:07

#548: Disordered Eating and Body Image in the Fitness...

Sigma Nutrition Radio ·

2025/01/01

Fitness pursuits can bring various benefits. However, within the modern fitness industry there is a complex interplay of body image ideals, societal pressures, and disordered eating behaviors. Research continues to illuminate how certain practices and messaging within the industry—such as the overvaluation of leanness or the impact of social media personas—can fuel body dissatisfaction and disordered eating. For fitness coaches and enthusiasts alike, this raises important questions: What defines

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01:06:18

#547: Healthspan, Healthy Ageing & Chronic Disease –...

Sigma Nutrition Radio ·

2024/12/23

Healthspan, healthy ageing, and chronic disease are pivotal topics in today’s health discourse, emphasizing not just the length of life but the quality of those additional years. Focusing on healthspan means striving for a longer period of life free from disease and disability, which is increasingly important as global life expectancies rise. Healthy ageing involves adopting lifestyle habits that promote physical, mental, and social well-being throughout the lifespan, thereby reducing the risk of

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59:03

#546: Professional Standards & Scope of Practice for...

Sigma Nutrition Radio ·

2024/12/18

Navigating the complex and often underemphasized requirements of professional standards, legal considerations, and insurance can be challenging for sports nutrition practitioners and personal trainers. Many professionals, especially early in their careers, may overlook or minimize these responsibilities, focusing primarily on the practical and enjoyable aspects of helping clients achieve their goals. However, staying informed and adhering to these standards is not only essential for providing

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56:58

#545: Carbohydrate Metabolism, Performance &...

Sigma Nutrition Radio ·

2024/12/10

Carbohydrate metabolism and metabolic health have become central themes in the science of nutrition, with questions about fuel utilization, the impact of different diets, and the potential of ketone supplements driving new research. As researchers continue to uncover how the body adapts to various energy sources, there are emerging insights into how glucose tolerance, glycogen utilization, and even ketogenic diets influence not only physical performance but also long-term health outcomes

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11:52

Appetite and Satiety: Key Concepts and Practical...

Sigma Nutrition Radio ·

2024/12/03

Appetite and satiety are fundamental concepts shaping how we eat, why we feel hunger, and what keeps us satisfied after meals. From the biological signals sent by our gut to the psychological influences of food cues, understanding these processes can provide valuable insights into how we manage our food intake. In this episode, we delve into the interplay between hormones, food properties, and external factors that regulate appetite and fullness, exploring how these mechanisms work together—or

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52:56

#544: Genetic Variants and Response to Nutrients –...

Sigma Nutrition Radio ·

2024/11/26

In the realm of nutrition science, individual differences are more profound and impactful than many realize. For decades, we’ve developed dietary recommendations with a “one-size-fits-all” approach, assuming that most people respond similarly to specific nutrients. But Dr. Martin Kohlmeier, a pioneer in precision nutrition, challenges this very notion. How might an individual’s genetic makeup alter their need for certain nutrients? With advances in nutrigenetics, we’re beginning to see how

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50:46

#543: Eye Health & Nutrition – Prof. John Nolan

Sigma Nutrition Radio ·

2024/11/19

In this episode, we dive deep into the world of ocular nutrition with Professor John Nolan, exploring how specific nutrients can play crucial roles in preserving eye health, improving vision and supporting cognitive function. With age-related macular degeneration (AMD) affecting millions globally, Professor Nolan sheds light on groundbreaking research showing how certain carotenoids—natural pigments found in plant foods—could impact eye health and perhaps even neurodegenerative conditions like

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01:22:56

#542: Nutrients for Cognitive Performance in Sports –...

Sigma Nutrition Radio ·

2024/11/12

In the world of sports nutrition, understanding how different supplements and nutrients impact not just physical performance but also cognitive function is rapidly gaining traction. Athletes are constantly seeking that competitive edge, and while many are familiar with the benefits of carbohydrates and caffeine for energy and focus, there’s much more at play. Emerging research is highlighting the roles of compounds like creatine and omega-3s, not only for muscle recovery but also for brain health,

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608 results

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