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Sigma Nutrition Radio

Sigma Nutrition Radio

By: Danny Lennon
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The podcast for lovers of nutrition science! Listen to detailed discussions with researchers and leading experts about the science of nutrition, dietetics and health.© Sigma Nutrition Hygiene & Healthy Living
Episodes
  • #567: Did Big Sugar Hijack the Food Pyramid? Were Low-fat Diets a Scam that Damaged Our Health?
    Jun 24 2025

    For decades, dietary guidelines—and the Food Pyramid in particular—have been at the center of heated debates and considerable controversy. These guidelines have often been accused of being influenced by industry interests, oversimplifying nutritional nuance, or even directly contributing to rising obesity and metabolic disease rates.

    In this episode, we critically assess common claims surrounding the Food Pyramid, including whether it was truly shaped by vested industry interests, if it encouraged harmful dietary shifts toward excessive carbohydrate and sugar consumption, and whether the subsequent health outcomes seen at the population level can be fairly attributed to these guidelines.

    Additionally, we evaluate the role of the sugar industry in funding key studies and publications, examining the implications such conflicts of interest may have had on nutritional science.

    Drawing on historical context, rigorous examination of scientific evidence, and an evaluation of how nutritional recommendations have evolved, this discussion aims to clarify misunderstandings, highlight legitimate criticisms, and separate fact from persistent myths regarding dietary guidance and its implications for health.

    Timestamps
    • [01:37] Common claims and narratives
    • [03:15] Historical context of dietary guidelines
    • [21:57] Sugar industry influence on dietary research
    • [36:17] The mcgovern report
    • [40:49] Misconceptions about dietary guidelines
    • [44:28] Changes in food supply and consumption
    • [58:15] Critiques and conflicts of interest
    • [01:06:47] Key ideas segment (Premium-only)

    Links & Resources

    • Go to episode page (with linked resources)
    • Subscribe to Sigma Nutrition Premium
    • Join the Sigma email newsletter for free
    • Do you want to be skilled in reading nutrition studies? Enroll in the next cohort of our Applied Nutrition Literacy course
    • Alan Flanagan’s Alinea Nutrition Education Hub
    • MASS Research Review - latest training and nutrition research relevant to strength trainees
    • Examine is the best online database for looking at the evidence of diets, foods and supplements on a range of health outcomes.
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    1 hr and 9 mins
  • SNP41: Do Certain Foods Really Cause Inflammation – And Are Anti-Inflammatory Diets the Answer?
    Jun 17 2025

    Inflammation has become a nutrition buzzword, often used in extreme or misleading ways. This episode aims to clarify what inflammation is, how it relates to diet and health, and whether specific foods truly provoke inflammatory responses in the body.

    The episode provides a nuanced, evidence-based look at inflammation and diet. It explains the difference between acute and chronic inflammation, outlines the role of chronic low-grade inflammation in disease, and emphasizes that overall dietary patterns – rather than any single food – are what influence our inflammatory status.

    Commonly demonized foods (such as sugar, wheat, and dairy) are scrutinized, and the conversation debunks myths about them being uniformly “inflammatory.” In this episode, Danny takes a look at what the scientific evidence actually shows about anti-inflammatory diets.

    Note: This is a Premium-exclusive episode.

    Timestamps
    • 01:06 Understanding Inflammation: Basics and Biomarkers
    • 04:02 Acute vs. Chronic Inflammation
    • 14:21 Biomarkers of Inflammation
    • 22:51 Dietary Patterns and Inflammation
    • 34:53 Specific Foods and Nutrients Impacting Inflammation
    • 47:01 Practical Takeaways for an Anti-Inflammatory Diet
    • 51:30 Conclusion
    Related Resources
    • Subscribe to Sigma Nutrition Premium
    • Enroll in the next cohort of our Applied Nutrition Literacy course
    • Related podcast episodes:
      • 329: Diet & Inflammation
      • 353: James Hébert, ScD – Dietary Inflammatory Index
    • Sigma Statement: Nutrition & Immune Function
    • The Dietary Inflammatory Index (DII) – Hébert et al., 2019
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    16 mins
  • #566: Can We Maintain Weight Loss? Pharmacology and Behavior – Tara Schmidt, RD
    Jun 10 2025

    GLP-1 receptor agonists have changed the landscape of obesity treatment, offering levels of weight loss once thought unattainable without surgery. But what happens after the weight is lost? And can we really talk about success without talking about maintenance?

    While much of the public discourse fixates on dramatic weight loss numbers, the harder question is what comes next. Can lifestyle interventions alone sustain weight loss after GLP-1 cessation? How do metabolic adaptations and behavioral relapse factor in? And what does the data actually show about relapse rates, nutritional adequacy, and lean mass preservation when using these medications?

    In this episode, Danny sits down with Tara Schmidt, dietitian at the Mayo Clinic, to examine the intersection of pharmacology and behavior in long-term weight management.

    Tara Schmidt is a registered dietitian and an instructor of nutrition at Mayo Clinic. As the lead dietitian for the Mayo Clinic Diet, she provides guidance rooted in evidence-based principles. She hosts the Mayo Clinic On Nutrition podcast and co-authored The Mayo Clinic Diet: Weight Loss Medications Edition.

    Timestamps
    • [05:17] Understanding weight loss maintenance
    • [08:44] Defining success in weight loss maintenance
    • [11:54] Predictors of maintenance: self-monitoring and behavioral strategies
    • [23:37] Pharmacological interventions: GLP-1 receptor agonists
    • [31:06] Dietary considerations for those taking GLP-1 RAs
    • [37:07] Addressing misconceptions about weight loss drugs
    • [42:48] Final thoughts and takeaways
    • [48:49] Key ideas (Premium-only)
    Links/Resources
    • Subscribe to Sigma Nutrition Premium
    • Go to episode page
    • Join the Sigma email newsletter for free
    • Enroll in the next cohort of our Applied Nutrition Literacy course
    • Visit sigmanutrition.com
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    51 mins
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