Listen Here:
Click or simply search “Sigma Nutrition” on your podcast platform of choice.
Or listen directly on the Sigma website here.
Introduction
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 compares them against the current scientific evidence.
This is highly relevant to nutrition science and clinical practice today, as many patients and practitioners are encountering conflicting information about vegetable oils.
By exploring the origins of seed oils, their biochemical effects, health outcome data, and the misinformation ecosystem, the episode aims to clarify how omega-6 rich seed oils fit into a healthy diet and what evidence-based guidelines say.
Related resources
- Join the Sigma newsletter for free
- Subscribe to Sigma Nutrition Premium
- Enroll in the next cohort of our Applied Nutrition Literacy course
- Sigma Statement: Seed Oils on Trial: Is the Panic Justified?
- Related podcast episodes:
- Relevent Studies:
- Peterson et al., 2024 – Perspective on the health effects of unsaturated fatty acids and commonly consumed plant oils high in unsaturated fat
- Johnson & Fritsche, 2012 – Effect of Dietary Linoleic Acid on Markers of Inflammation in Healthy Persons: A Systematic Review of Randomized Controlled Trials
- Li et al., 2020 – Dietary intake and biomarkers of linoleic acid and mortality: systematic review and meta-analysis of prospective cohort studies
- Mozaffarian et al., 2010 – Effects on Coronary Heart Disease of Increasing Polyunsaturated Fat in Place of Saturated Fat: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
- [01:00]Understanding terms: PUFA, Linoleic Acid, Omega-6
- [05:20]Do seed oils cause inflammation?
- [12:44]Omega-3 and omega-6
- [16:43]Inflammatory markers and linoleic acid
- [19:22]Oxidation and cooking oils
- [33:23]Impact of Training Schedules on Sleep
- [26:25]Refining processes and health concerns
- [30:32]Health outcomes and polyunsaturated fats
- [35:18]Evidence cited by anti-seed oil proponents
- [43:48]Conclusions
The Hosts
Click through to your app of choice to listen and subscribe:
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.
Introduction to this Episode
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 theyʼve been unjustly demonized.
The discussion tackles prevalent claims – that seed oils drive inflammation, oxidation, and chronic disease – and compares them against the current scientific evidence.
This is highly relevant to nutrition science and clinical practice today, as many patients and practitioners are encountering conflicting information about vegetable oils.
By exploring the origins of seed oils, their biochemical effects, health outcome data, and the misinformation ecosystem, the episode aims to clarify how omega-6 rich seed oils fit into a healthy diet and what evidence-based guidelines say.
