Best Nolan Carroll Podcasts (2025)

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#564: Is Protein’s Appetite-Suppressing Power Overstated? 1:11:19

24h ago1:11:19

1:11:19

In this episode, we take a deep dive into the commonly held belief that protein is the most satiating macronutrient. It’s an idea that shows up frequently in both clinical guidance and popular nutrition discourse: if you want to feel fuller, eat more protein. But how robust is that claim when you drill into the details of the evidence? To explore t…

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#563: The Financialization of the Food System – Prof. Martin Caraher 44:27

8d ago44:27

44:27

Global food systems have been increasingly subjected to financial speculation, leading to adverse consequences for growers, consumers, and public health. But what are the systemic vulnerabilities that impact food security, equitable access to nutritious food, and the broader socio-political frameworks influencing these outcomes? Understanding the f…

1
SNP40: Do Seed Oils Cause Inflammation & Chronic Disease? 14:48

15d ago14:48

14:48

Seed oils have recently become a hotly debated topic in nutrition, fueled by sensational claims on social media. In this episode, the central theme is examining whether seed oils are truly harmful or if they’ve been unjustly demonized. The discussion tackles prevalent claims – that seed oils drive inflammation, oxidation, and chronic disease – and …

1
#562: How to Detoxify Yourself – Quack Asylum Special 1:20:51

22d ago1:20:51

1:20:51

In this Quack Asylum episode, Danny and Alan critically examine the claims surrounding “detoxification protocols” – specialized diets, cleanses, or supplements marketed to eliminate toxins from the body for better health. The central theme is whether these detox plans actually improve health outcomes or if they’re built on pseudoscience and fear. M…

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#561: Emulsifiers in the Modern Diet: Health Risk or Harmless Additive? 50:41

29d ago50:41

50:41

Emulsifiers are a ubiquitous component of the modern food supply, found in everything from salad dressings and dairy products to pastries and sauces. Traditionally regarded as safe by regulatory agencies, emulsifiers play a vital role in enhancing the texture, stability, and shelf-life of countless processed foods. Yet, in recent years, emerging re…

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#560: Neurodiversity & Nutrition: Choline, ADHD, Dyslexia, and Beyond – Emma Derbyshire, PhD 45:55

1M ago45:55

45:55

Nutrition is increasingly being considered as a modifiable factor that may influence neurodevelopmental outcomes. While severe deficiencies in certain nutrients are known to have dramatic effects, there is growing interest in the potential impact of more subtle insufficiencies — particularly during critical windows such as pregnancy, infancy, and e…

1
Do Lipids Increase During Weight Loss? (SNP39) 20:03

1M ago20:03

20:03

This is a segment from one of our Premium-exclusive AMA (ask me anything) episodes, where we answer questions submitted by Premium subscribers. To listen to the full episode, you’ll need to be a Premium subscriber and access the episode on the private Premium feed. Questions Answered in This Episode [02:00] Why does the Mediterranean diet emphasize…

1
#559: Skin Health & Nutrition – Thivi Maruthappu, PhD 45:29

2M ago45:29

45:29

The intersection of nutrition, dermatology, and skin health is an area of growing interest, yet one that remains riddled with misinformation and oversimplified claims. The influence of dietary patterns, specific nutrients, and lifestyle factors on conditions such as acne, eczema, psoriasis, and skin aging has been widely debated, with varying level…

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#558: Rethinking Ultra-Processed Foods in the Modern Food System – Duane Mellor, PhD 52:08

2M ago52:08

52:08

Discussions around ultra-processed foods (UPFs) and their role in public health have gained significant traction in recent years. While some advocate for categorizing and regulating these foods due to their potential negative health effects, others argue that such classifications can oversimplify the issue and detract from more actionable dietary c…

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#557: Health Psychology & Eating Behaviour – Prof. Jane Ogden 48:46

2M ago48:46

48:46

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 die…

1
SNP38: What is Quality Sleep? 22:11

2M ago22:11

22:11

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,…

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#556: Can We Restore the Gut Microbiome Through Dietary Changes? – Anissa Armet, PhD 1:06:28

3M ago1:06:28

1:06:28

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…

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#555: What Should the Dietary Guidelines Say? – Prof. Christopher Gardner 59:29

3M ago59:29

59:29

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 inv…

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#554: Crucial Ideas for Understanding Nutrition Science 1:13:12

3M ago1:13:12

1:13:12

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 exposur…

1
#553: Healthy Habits for Fertility and Reproductive Health – Marjorie Nolan Cohn, RD 40:58

3M ago40:58

40:58

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 a…

1
#552: Diet & Sleep Interactions – Marie-Pierre St. Onge, PhD 41:04

4M ago41:04

41:04

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 associ…

1
Multivitamin Nihilism: Is it Actually Worthless to Supplement? (SNP37) 17:39

4M ago17:39

17:39

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 …

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#551: How to Shift from Short-term Dieting to Sustainable Lifestyle Changes – Laurin Conlin 1:02:19

4M ago1:02:19

1:02:19

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…

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#550: Eating Disorder Risk in Sport, Wellness & Fitness – Jillian Lampert, PhD, RD 53:10

4M ago53:10

53:10

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 t…

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#549: Are We Doomed? Trust, Misinformation, and the Future of Health & Fitness Science – Joe Klemczewski, PhD 1:19:25

4M ago1:19:25

1:19:25

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 credibili…

1
IGF-1 and Diet: Cause For Concern? (SNP36) 21:56

5M ago21:56

21:56

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 …

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#548: Disordered Eating and Body Image in the Fitness Industry – Michelle Carroll 48:07

5M ago48:07

48:07

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 …

1
#547: Healthspan, Healthy Ageing & Chronic Disease – Best of 2024 1:06:18

5M ago1:06:18

1:06:18

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. Healt…

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#546: Professional Standards & Scope of Practice for Nutrition Professionals – Alex Thomas 59:03

5M ago59:03

59:03

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 enjo…

1
#545: Carbohydrate Metabolism, Performance & Metabolic Health – Prof. Javier Gonzalez 56:58

6M ago56:58

56:58

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 ho…

1
Appetite and Satiety: Key Concepts and Practical Insights (SNP35) 11:52

6M ago11:52

11:52

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 in…

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#544: Genetic Variants and Response to Nutrients – Martin Kohlmeier, MD PhD 52:56

6M ago52:56

52:56

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 not…

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#543: Eye Health & Nutrition – Prof. John Nolan 50:46

6M ago50:46

50:46

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 resea…

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#542: Nutrients for Cognitive Performance in Sports – Prof. Shawn Arent, PhD 1:22:56

7M ago1:22:56

1:22:56

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 mo…

1
#541: Lean Mass Hyper Responders & the Lipid Energy Model: Do the Claims Stand Up to Scrutiny? 1:29:38

7M ago1:29:38

1:29:38

When discussing cardiovascular health, few topics stir as much debate as cholesterol, particularly in relation to low-carb and ketogenic diets. Recently, there’s been significant attention given to a proposed model that suggests high LDL cholesterol may not pose the same cardiovascular risk in certain individuals, specifically those labeled as “lea…

1
Fasting for Health: What Do We Know? (SNP34) 21:04

7M ago21:04

21:04

Fasting has gained immense popularity as a dietary approach, but what does the scientific evidence say about its health benefits? Studies have explored how fasting might influence metabolic markers, energy expenditure, and even aging. However, while fasting shows promise in some animal models, translating these effects to humans is less clear. A ke…

1
#540: How Can We Improve Body Image and Self-Esteem Without Physique Change? – Gabrielle Fundaro, PhD & Eric Trexler, PhD 1:01:14

7M ago1:01:14

1:01:14

Body image and self-worth are deeply intertwined concepts that influence how we see ourselves and interact with the world. Many people believe that changing their physique is the key to improving their body image, but is it really that simple? This connection between appearance and self-esteem raises important questions about how we define confiden…

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#539: How Does Carbohydrate Availability Impact Resistance Training? – Cliff Harvey, PhD & Eric Helms, PhD 1:32:54

8M ago1:32:54

1:32:54

Some suggest that, since individual lifts or short-duration efforts don’t rely heavily on glycogen, carb intake might not be critical for strength athletes. If glycogen depletion isn’t a pressing issue, could athletes thrive on lower-carb diets without sacrificing performance? Or could there be overlooked benefits to having greater carbohydrate ava…

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#538: Can Fish Oil Supplementation Increase Risk of Irregular Heart Rhythms? 55:03

8M ago55:03

55:03

Omega-3 fatty acids are often viewed as beneficial or, at worst, neutral supplements when it comes to supporting cardiovascular health, lowering triglycerides, and offering anti-inflammatory effects. Much of the focus in recent years has centered on understanding how significant these benefits are, particularly for heart health, with many studies h…

1
#537: Appetite Regulation, Metabolic Compensation and More – Stephan Guyenet, PhD 1:04:07

8M ago1:04:07

1:04:07

This is an “ask me anything” (AMA) episode with Dr. Stephan Guyenet, an expert in obesity neuroscience and eating behavior. This episode was originally published on Sigma Nutrition Premium. If you’re interested in subscribing to Sigma Nutrition Premium, then check all the details here. Questions Answered: [04.27] If we surgically remove adipose tis…

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Caffeine Metabolism and Individual Variability 20:50

8M ago20:50

20:50

Questions Answered in This Episode [02:28] Caffeine metabolism and individual variation. [14:47] High-sodium electrolyte supplements & recreational trainees. [32:55] Is a “too low” BMI a problem? [41:38] Are claims about vegan diets being nutritionally insufficient overblown? [51:33] Familial hypercholesterolemia & further lipid-lowering [58:05] Me…

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#536: Improving Sleep in Combat Sports Athletes – Ian Dunican, PhD 1:15:57

8M ago1:15:57

1:15:57

In the world of combat sports, optimizing performance extends beyond physical training and nutrition—sleep plays a critical role. Maladaptive sleep behaviors, such as inconsistent sleep schedules and inadequate sleep duration, can significantly impair an athlete’s performance by reducing cognitive function, reaction time, and recovery ability. Unde…

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#535: Is This Meta-analysis Good or Bad? – How to Critique Nutrition Studies 1:19:01

9M ago1:19:01

1:19:01

To many, meta-analyses are seen as a research tool that is often regarded as the pinnacle of evidence in nutrition science. But is this accurate? What exactly makes a meta-analysis reliable or flawed? How can we distinguish between a well-conducted study and one that might mislead even the most well-intentioned reader? In this episode, through thre…

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#534: Are Plant-Based Meat Alternatives Healthy? – Matthew Nagra, ND 46:24

9M ago46:24

46:24

The debate between animal-based and plant-based meat alternatives (PBMAs) has garnered significant attention, especially concerning their impact on cardiovascular health. As PBMAs become increasingly popular, questions about their nutritional profiles and long-term health implications have emerged. Are these alternatives genuinely healthier than tr…

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Timing of Eating: Energetic Hypothesis (SNP32) 11:06

9M ago11:06

11:06

In the ongoing exploration of weight loss strategies, the timing of food intake has emerged as a fascinating area of study. While traditional advice often focuses on what we eat, growing evidence suggests that when we eat could also play a crucial role in weight management. This concept, known as chrononutrition, examines how our body’s internal cl…

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#533: Making Sense of Omega-3 Supplement Trials – Prof. JoAnn Manson, MD, DrPH 51:24

9M ago51:24

51:24

The impact of omega-3 fatty acids on chronic disease risk has been a topic of considerable interest and research. The VITAL trial, which assessed the effects of vitamin D and omega-3 supplements on various health outcomes, including cardiovascular disease and cancer, provided insightful findings. Additionally, numerous other supplement trials have …

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#532: Dietary Fat: Evidence vs. Misinformation – Alice Lichtenstein, DSc 49:43

10M ago49:43

49:43

In the realm of nutrition science, few topics have sparked as much debate and evolution in understanding as the impact of dietary fat on cardiovascular health. Dr. Alice Lichtenstein, a renowned expert in nutrition and cardiovascular disease, brings clarity to this complex field. Her extensive research at several prestigious institutions has been p…

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#531: Correlation, Causation & Cliché 1:01:26

10M ago1:01:26

1:01:26

In the realm of nutrition science and health, understanding the intricate relationship between various factors and health outcomes is crucial yet challenging. How do we determine whether a specific nutrient genuinely impacts our health, or if the observed effects are merely coincidental? This intriguing question brings us to the core concepts of co…

1
What is Regression to the Mean? (SNP31) 8:32

10M ago8:32

8:32

Regression to the Mean (RTM) is a statistical phenomenon where extreme values on one measurement tend to move closer to the average on subsequent measurements due to natural variability. In this Premium-exclulsive episode, Danny gives an explanation of this concept with some examples in nutrition research. Subscribe to Sigma Nutrition Premium Go to…

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#530: Evidence-based Strategies for Learning & Skill Acquisition – Scott Young 55:00

10M ago55:00

55:00

The concept of “learning how to learn” focuses on meta-learning, which involves improving one’s own learning strategies. Instead of just absorbing information, meta-learners refine the skills that make learning itself more effective. Cognitive science supports various learning strategies by exploring how the brain processes information. Techniques …

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#529: Addressing Popular Claims About Cholesterol, Dietary Fat and Heart Disease 2:13:56

11M ago2:13:56

2:13:56

In episode 529 of Sigma Nutrition Radio, we discuss all things related to cholesterol, atherosclerosis, heart disease, and dietary fat. The discussion extensively covers the impact of LDL cholesterol and ApoB on atherosclerotic plaque progression, cardiovascular events, and the benefits of early LDL lowering interventions, particularly through the …

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#528: Is Unprocessed Red Meat Problematic for Our Health? 1:17:00

11M ago1:17:00

1:17:00

The consumption of red meat, specifically the distinction between unprocessed and processed varieties, has been a subject of considerable debate in nutritional science and public health. There is a fair amount of confusion and lack of clarity surrounding this issue. While the harmful effects of processed meat are well-documented and less controvers…

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#527: How to Prevent & Treat Hypertension – Dr. Mohammed Alo, DO 1:09:53

11M ago1:09:53

1:09:53

Hypertension, commonly known as high blood pressure, is a silent yet prevalent health issue that affects millions of people worldwide. Often going unnoticed until significant damage has been done, hypertension can lead to severe cardiovascular complications if not properly managed. Mechanistically, the causes of hypertension are complex, involving …

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#526: Eating Rate, Food Texture & Satiation – Marlou Lasschuijt, PhD 31:50

11M ago31:50

31:50

Food science and behavior are intimately connected. One critical but often overlooked facet of this connection is food texture and its substantial impact on eating behavior and energy intake. Food texture encompasses characteristics such as hardness and structure. It categorizes food into liquids, semi-solids, and solids, each with a wide range of …

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#525: Cholesterol-Lowering Medication – Dr. Paddy Barrett 48:29

12M ago48:29

48:29

Cholesterol-lowering medications, particularly statins, play a pivotal role in reducing low-density lipoprotein cholesterol (LDL-C) and apolipoprotein B (apoB) concentrations, which are causal markers in atherosclerosis development. The efficacy of these medications is well-documented, with numerous clinical trials demonstrating substantial benefit…

Podcasts Worth a Listen

Nolan Carroll Podcasts

Podcasts Worth a Listen