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Introduction
This is a Premium-exclusive episode of the podcast. To listen to the full episode you need to be subscribed to Sigma Nutrition Premium.
Each year, the conversations on Sigma Nutrition Radio aim to examine the ideas that shape how we understand nutrition, health, and human behavior. This episode brings together the key insights from those discussions, revisiting the most important themes, emerging evidence, and shifts in understanding from the past year.
Across topics such as dietary guidelines, ultra-processed foods, sleep, metabolism, environmental exposures, and the psychology of eating, this review distills what the science actually shows and what remains uncertain.
Whether you have followed throughout the year or are tuning in for the first time, this episode provides a concise synthesis of what truly mattered and what these ideas imply for how we interpret nutrition science moving forward.
Related resources
- Join the Sigma newsletter for free
- Subscribe to Sigma Nutrition Premium
- Become a member of Alan Flanagan’s Alinea Nutrition Education Hub
- Enroll in the next cohort of our Applied Nutrition Literacy course
- Related episodes:
- 555: What Should the Dietary Guidelines Say? – Prof. Christopher Gardner
- 552: Diet & Sleep Interactions – Marie-Pierre St. Onge, PhD
- 558: Rethinking Ultra-Processed Foods in the Modern Food System – Duane Mellor, PhD
- 577: Ultra-processed vs. Minimally Processed Diets: UPDATE Trial – Samuel Dicken, PhD
- 574: Microplastics & Health: What Do We Know? – Prof. Ian Mudway
- 563: The Financialization of the Food System – Prof. Martin Caraher
- [02:23]How dietary guidelines are shaped, misused, and what the evidence really supports.
- [13:10]The bidirectional relationship between sleep quality, circadian timing, and diet.
- [20:03]Rethinking ultra-processed foods: mechanisms, misconceptions, and policy realism.
- [29:26]The UPDATE trial and what nutrient-matched processing tells us about satiety and intake.
- [35:37]Microplastics, pollution, and why evidence must outrun public fear.
- [43:46]The financialization of food systems and its impact on inequality and diet quality.
The Hosts
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Dr. Alan Flanagan has a PhD in nutrition from the University of Surrey, where his doctoral research focused on circadian rhythms, feeding, and chrononutrition.
This work was based on human intervention trials. He also has a Masters in Nutritional Medicine from the same institution.
Dr. Flanagan is a regular co-host of Sigma Nutrition Radio. He also produces written content for Sigma Nutrition, as part of his role as Research Communication Officer.
Danny Lennon has a master’s degree (MSc.) in Nutritional Sciences from University College Cork, and he is the founder of Sigma Nutrition.
Danny is currently a member of the Advisory Board of the Sports Nutrition Association, the global regulatory body responsible for the standardisation of best practice in the sports nutrition profession.
