Sigma Nutrition Radio

In this discussion, Prof. Emily Ho, Director of the Linus Pauling Institute, sheds light on the often-overlooked role of zinc in health. She reveals that zinc insufficiency affects about 10% of the U.S. population, impairing immune function and accelerating aging. The concept of 'inflammaging' is explored, showcasing how low zinc levels contribute to chronic inflammation as we age. Her insights on the importance of adequate zinc for DNA integrity and overall disease prevention illustrate why this micronutrient should not be underestimated.

The hosts dissect the belief that protein is the ultimate appetite suppressor, questioning its validity based on recent research. They explore how factors like food texture and energy density may influence satiety just as much, if not more, than protein itself. Historical context and the distinction between satiation and satiety are discussed, revealing the complexities of appetite regulation. This insightful conversation emphasizes the need for a nuanced understanding of dietary influences on hunger, which could reshape approaches to weight management.

In this enlightening discussion, Professor Martin Caraher, Emeritus Professor of Food and Health Policy at the University of London, explores the troubling financialization of food systems. He addresses how speculation affects food prices and exacerbates food poverty. The conversation also delves into the impact of corporate concentration on food security and the pressing need for reform in policy practices. Caraher emphasizes the importance of equitable access to nutritious food and proposes ethical approaches to strengthen global food systems.

The debate around seed oils heats up as claims about their harmful effects circulate online. Are these oils really driving inflammation and chronic diseases, or is it all a misunderstanding? Delve into the science behind omega-6 fatty acids and their impact on health. Learn about the refining processes of these oils and the evidence supporting their place in a balanced diet. The conversation aims to untangle the misinformation surrounding vegetable oils and clarify their role in nutrition today.

In this discussion, nutritional scientist Alan Flanagan critically examines detoxification protocols often marketed for better health. He uncovers whether these diets are founded in science or blown out of proportion by fear. Flanagan emphasizes the misconception that the body can't detoxify itself naturally and explores the role of the liver and nutrients in this process. He also debunks myths surrounding mold exposure and its alleged health impacts, advocating for evidence-based approaches to health and the importance of critical thinking in nutrition.

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 research has prompted a reevaluation of this assumption, raising intriguing questions about whether regular consumption of these additives might have previously overlooked health consequences. Recent epidemiological studies have suggested possible associations between higher emulsifier intake and chronic health issues. Concurrently, mechanistic research has provided some biological pathways through which emulsifiers could disrupt gut health. This episode aims to critically examine the scientific literature surrounding dietary emulsifiers, differentiating credible evidence from speculation, and outlining what can—and cannot—be concluded about their potential risks. Timestamps [01:18] Emulsifiers in food: definition, function, and common uses [05:15] Regulatory approval and traditional safety evaluations [09:32] Epidemiological studies on emulsifiers: nutriNet-santé cohort [14:55] Emulsifiers and cardiovascular disease risk [26:12] Emulsifiers and type 2 diabetes risk [30:01] Emulsifiers and cancer risk [35:05] Mechanistic insights: emulsifiers, gut health, and inflammatory bowel disease (IBD) [47:15] Practical recommendations and clinical implications Related Resources Subscribe to Sigma Nutrition Premium Go to episode page (with study links) Join the Sigma email newsletter for free Enroll in the next cohort of our Applied Nutrition Literacy course

Emma Derbyshire, PhD, a maternal nutrition expert and author of *Nutrition for ADHD and Dyslexia*, explores the crucial role of choline in neurodevelopment. She discusses how low choline intake could affect brain function, especially in children with ADHD and dyslexia. The conversation highlights the need for better research on nutrient intake and its impact on cognitive performance. Derbyshire emphasizes practical dietary strategies to support those with neurodevelopmental conditions and the importance of incorporating choline-rich foods into daily habits.

Explore the surprising dynamics of lipids during weight loss! Discover why the Mediterranean diet prioritizes monounsaturated fats. Learn about dietary strategies for premenopausal women on a plant-based diet, and find out which foods might support connective tissue health. Delve into the keto diet's potential in cancer treatment and uncover the biochemical processes behind fat loss. Plus, get insights on dietary cholesterol absorption and the safety of high protein intake!

Dr. Thivi Maruthappu, the UK's first dual-qualified dermatologist and nutritionist, delves into the complex relationship between diet and skin health. She debunks common myths surrounding dietary influences on acne and eczema, emphasizing the pitfalls of relying solely on natural remedies. The importance of sunscreen in skin aging is discussed, along with tailored skincare for children. Mindfulness practices are explored as essential for overall well-being, providing listeners with a holistic view on achieving healthier skin.

Dr. Duane Mellor, a registered dietitian and academic researcher specializing in clinical dietetics and diabetes, dives into the complexities surrounding ultra-processed foods (UPFs) and their implications for public health. He emphasizes the need for nuanced discussions rather than overly simplistic classifications. The conversation addresses the challenges of food poverty stigma, explores historical contexts of food processing, and advocates for practical solutions. Mellor also highlights the importance of mindfulness in food choices to promote better health outcomes.