About this episode
Dr. Vera Tarman sits down with Dr. Cate Shanahan, family physician, nutrition consultant, and author of Deep Nutrition and Dark Calories, to discuss her case against industrial seed oils, how they may influence metabolic and mental health, and why she believes they can intensify sugar cravings and insulin resistance. We explore mechanisms she proposes (oxidation, mitochondrial stress), the "Hateful Eight" oils, and practical swaps that listeners can try if they choose to reduce seed oils. This episode presents a viewpoint that's debated in nutrition science; we encourage critical thinking, self-experimentation within a safe plan, and consultation with your care team. What we cover Seed oils vs. sugar: Why Dr. Shanahan argues seed oils may drive sugar cravings and insulin resistance. Oxidation & mitochondria: Her biochemical rationale for how highly unsaturated oils can oxidize and affect cell energy. The "Hateful Eight": Corn, canola, cottonseed, soybean, sunflower, safflower, rice bran, grapeseed—why she cautions against them. Historical context: Marketing, refinement, and how these oils entered the food supply. Mental health & cravings: Proposed links between oxidized fats, energy instability, mood, and appetite signals. Practical swaps: Unrefined olive, avocado, coconut, butter/ghee; flavor-forward nut/seed oils used unheated; reading labels and cooking at home. Diet nuance: Why some low-carb or plant-forward eaters thrive when minimizing seed oils; where refined proteins fit. Key takeaways If you experiment with reducing industrial seed oils, pair it with whole-food carbs and adequate protein to support energy stability. Favor unrefined, flavor-forward oils (e.g., extra-virgin olive oil) and avoid reheating/frying oils repeatedly. Improvements people report first: steadier energy, fewer GI symptoms, fewer cravings—but your mileage may vary. This topic is
