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We’re wrapping the seed-oil controversy, anchored by the most cited no Lab Core study on soybean oil. The host treats it as a contrarian examination meant to reveal truth in the middle, not to condemn without nuance. The discussion recalls three fat-related topics, cholesterol, and LDL heterogeneity, and moves toward cardiovascular disease, inflammation markers, and the four key claims about soybean oil. The panel even states plainly: "soybean oil has no effect on markers of inflammation" and "soybean oil has no effect on markers of oxidation." On study design and biomarkers, the host notes inconsistencies: one study compares butter, stick margarine, and soybean oil with LDL, while CRP is only mentioned inconsistently. High sensitivity C-reactive protein is referenced as a marker of inflammation, yet the cited papers either omit CRP or report no significant effect. The lead author is identified as the head of the Soy Nutrition Institute, with a clear potential conflict of interest, and the transcript treats that controversy as central to evaluating the paper’s conclusions. Inflammation biomarkers like TNF, interleukin-1 beta, and interleukin-6 are analyzed; margarine shows pro-inflammatory signals relative to soybean oil or butter. The discussion notes that trans fats in hydrogenated margarine drive inflammation. It also describes phytosterols in vegetable oils as a mechanism that lowers blood cholesterol by competing for intestinal absorption. The speaker emphasizes that ‘oxidation’ and ‘inflammation’ are distinct systems, and that the paper’s four claims address inflammation and then oxidation with limited data on the latter. Deep into LDL structure, the host explains phospholipids, saturation, and how fatty-acid composition shapes susceptibility to oxidation. Oxidized LDL (OxLDL) and glycated LDL are described as modified LDL driving atherosclerosis, with sugar metabolism linking to glycation and AGE formation. Sleep, alternate-day fasting, and exercise are framed as practical ways to shift LDL size toward less dangerous profiles. The takeaway is that LDL modification—not just LDL levels—drives cardiovascular risk, and that nutrition science often requires nuance beyond heroic single-nutrient claims.

Jeff Nobbs and Malcolm Gladwell discuss the controversial topic of seed oils and their impact on health. Nobbs argues that many public health organizations are beginning to recognize that seed oils, particularly those high in omega-6 fatty acids like linoleic acid, may not be safe and could be harmful. He emphasizes that much of the research supporting seed oils is based on observational studies that show correlation rather than causation, often relying on biomarkers like cholesterol rather than actual health outcomes. Nobbs explains that seed oils contribute to oxidative stress in the body, which can lead to inflammation and various health issues, including heart disease. He points out that populations that do not consume seed oils tend to have lower rates of heart disease. He highlights the importance of oxidized LDL cholesterol as a significant risk factor for heart disease, linking it to the consumption of seed oils. The conversation shifts to the prevalence of seed oils in the modern diet, with Nobbs listing common sources such as soybean oil, canola oil, and corn oil, which constitute a large portion of American caloric intake. He notes that these oils are found in many packaged foods and restaurant meals, making it difficult for individuals to avoid them. Nobbs also discusses testing options for individuals to assess their omega-6 levels, recommending Omega Quant as a starting point. He provides a historical overview of how seed oils became popular, tracing back to the introduction of Crisco in 1911 and the subsequent push for vegetable oils in the mid-20th century, particularly after President Eisenhower's heart attack. The discussion touches on the motivations behind the continued promotion of seed oils by some health professionals, attributing it to biases and reliance on observational studies. Nobbs argues that the focus should be on the types of fats consumed, particularly the high levels of omega-6 in seed oils, which he believes are detrimental to health. Nobbs shares his personal journey into nutrition and health, motivated by the loss of his parents to cancer. He emphasizes the need for a better understanding of food and its impact on health, leading him to create a healthier cooking oil alternative through his company, Zero Acre. This oil is produced through fermentation and aims to provide a neutral-tasting, high smoke point oil that is healthier than traditional seed oils. The podcast concludes with Nobbs sharing his health philosophy, which includes avoiding seed oils, refined sugars, and refined flours, while encouraging individuals to listen to their bodies and consume nutrient-dense foods. He stresses the importance of maintaining physical fitness, setting boundaries in work and relationships, and being mindful of personal health choices.

Today's conversation centers on how ultra-processed foods and certain food policies appear to be linked to rising obesity, diabetes, cancer, and autoimmune disease, despite public health messaging to eat healthier and exercise more. The guest argues that simply counting calories overlooks satiety problems created by ultra-processed foods, which can drive overeating. In controlled feeding ward studies, when meals are matched for calories and macros, people eat more when ultra-processed foods are offered. Taste alone is not the whole explanation; satiety is sabotaged, the guest contends. A core focus is seed oils and how they entered the food supply. Canola oil, the guest explains, comes from rapeseed and contains erucic acid; rapeseed oil has historically been used industrially, and only later was low-erucic acid canola developed. The processing chain - pressing, refining, bleaching, deodorizing, exposures to hexane, packaging in plastics - creates polyunsaturated oils prone to rancidity and misinformation about LDL. The guest cautions that LDL lowering is not the sole health metric and notes how funding shapes which studies get done, often leaving modern randomized trials scarce. Health care critiques run through the discussion. The guest explains that most hypertension is primary—rooted in diet and lifestyle—while secondary hypertension is rare. He argues that vascular dysfunction and systemic inflammation linked to insulin resistance largely drive high blood pressure, and that dietary changes plus moderate exercise can fix it, whereas doctors frequently prescribe pills that manage symptoms without addressing root causes or downstream side effects. The conversation also touches how insurance models reward time over outcomes, shaping medical practice and recommendations. Another thread tracks endocrine disruption in daily life. The guests discuss cosmetics, fragrances, and skincare absorbing through the skin, birth control altering pheromonal signaling and partner choice, and the rise of raw milk as a debated option with some studies suggesting immune benefits for children. They also describe organ-based nutrition and the Heart and Soil supplement line, arguing that desiccated organs can influence organ health, with small doses such as three grams daily. The conversation closes with practical advice: simplify meals, read labels, and consider what touches your body.

Processed and ultra-processed foods are widespread, with ultra-processed foods engineered to promote addiction and overconsumption, contributing to around 11 million deaths globally each year. In India, vegetable oils are marketed as "heart healthy," but this claim is misleading due to the complex relationship between cholesterol and heart disease. The vilification of fats began with Ancel Keys' flawed studies, leading to a significant reduction in meat consumption and an increase in carbohydrate intake, which has correlated with rising rates of metabolic diseases. Saturated fats, found in natural foods like ghee, were deemed unhealthy, while polyunsaturated fats in vegetable oils were promoted as beneficial. However, these oils are pro-inflammatory, contributing to health issues, particularly in younger South Asians who have shifted from traditional fats to vegetable oils. High linoleic acid levels from these oils are linked to coronary artery disease, which is increasingly prevalent among younger populations. Patients with small, dense LDL particles are advised to eliminate vegetable oils and consume saturated fats, leading to improved health markers. Ghee is recommended for its health benefits, including better nutrient absorption and a higher smoke point. Reheating vegetable oils can produce harmful trans fats, and cooking practices should be adjusted to avoid this. Olive oil is generally healthier but should not be heated excessively. Young South Asians often experience hyperinsulinemia, linked to insulin resistance and excessive carbohydrate consumption, despite a high vegetarian population. The milling of grains has led to a loss of fiber, exacerbating health issues. Fiber is crucial for gut health, influencing insulin response and overall well-being. Fasting is presented as a beneficial practice, promoting metabolic flexibility and cellular rejuvenation through processes like autophagy. It can enhance brain function and energy levels, with gradual introduction recommended for those new to fasting. The discussion also highlights the impact of sugar on health, particularly through advanced glycation end-products (AGEs), which can lead to inflammation and chronic diseases. Continuous glucose monitoring is suggested as a tool for individuals to understand their blood sugar levels better. The conversation emphasizes the importance of personalized health approaches, particularly for women, who may respond differently to stress and dietary changes. The role of phytochemicals and polyphenols in promoting health and preventing chronic diseases is underscored, with a focus on traditional diets rich in these compounds. Himalayan Tartar buckwheat is introduced as a nutrient-dense food with immune-strengthening properties, having been largely lost in modern diets. The importance of sleep, mindful eating, and the impact of processed foods on mental health are discussed, with recommendations for incorporating whole foods and reducing sugar intake. The conversation concludes with a focus on the significance of maintaining a healthy metabolism, recognizing signs of metabolic dysfunction, and the role of dietary choices in managing anxiety and overall health. The importance of high-quality supplements, particularly fish oils and N-acetylcysteine, is emphasized for their protective effects against chronic diseases and inflammation.

Rich Roll introduces Simon Hill, a nutrition expert and author of "The Proof Is In The Plants," emphasizing the importance of a plant-predominant diet for human and planetary health. They discuss the confusion surrounding nutrition science, the impact of misinformation, and the need for evidence-based dietary choices. Simon shares his background, including his father's health crisis that sparked his interest in nutrition. He highlights the importance of being open to changing one’s views based on scientific evidence and the necessity of a rational approach to nutrition amidst the extremes often seen in social media. Simon explains that while genetics play a role in health, lifestyle choices significantly influence disease risk, with studies showing that lifestyle accounts for about 80% of health outcomes. He recounts how his brother's shift to a plant-based diet influenced him to explore nutrition science, leading to his master's degree in the field. Simon emphasizes that an optimal diet is characterized by low saturated fat, high fiber, and minimal ultra-processed foods, which can lead to better health outcomes. They delve into the hierarchy of scientific evidence, discussing the reliability of different types of studies, from expert opinions to randomized controlled trials and meta-analyses. Simon stresses the importance of understanding this hierarchy to navigate the conflicting narratives in nutrition science. He notes that while some studies may seem to support certain diets, the broader body of evidence often points to the benefits of a plant-predominant diet. The conversation shifts to saturated fat and its link to heart disease, with Simon explaining that the relationship is well-established in scientific literature. He addresses the criticisms of Ancel Keys, a pivotal figure in nutrition science, clarifying that his research supports the idea that high saturated fat intake increases heart disease risk. Simon also discusses the emerging trend of vilifying seed oils, arguing that while ultra-processed foods should be avoided, the evidence does not support the notion that seed oils are inherently harmful. They explore the environmental implications of dietary choices, with Simon highlighting that animal agriculture is a major contributor to greenhouse gas emissions and deforestation. He advocates for a shift towards plant-based diets to mitigate these issues, emphasizing the inefficiency of animal farming in terms of land use and resource allocation. Simon points out that regenerative agriculture practices can improve soil health but cautions against the notion that they can fully offset the environmental impact of livestock farming. The discussion touches on the need for a cultural shift towards stewardship of the land, with Simon referencing successful rewilding projects that demonstrate the benefits of excluding livestock from certain ecosystems. He concludes by emphasizing the importance of reducing meat consumption to free up land for more sustainable agricultural practices and to restore biodiversity. Finally, Simon shares that proceeds from his book will support conservation efforts in the Daintree Rainforest, highlighting the interconnectedness of health, environment, and indigenous stewardship. He encourages listeners to embrace a plant-predominant diet for both personal health and the health of the planet, reinforcing the message that small changes can lead to significant benefits for individuals and the environment.

The episode centers on a rigorous, data-driven examination of seed oils and their purported unique harm relative to other fats. The hosts explore why nutrition research yields contradictory results, emphasizing the need to compare isocaloric substitutions rather than isolated nutrients. They walk through landmark trials and meta-analyses, highlighting how trans fats confounded early studies of polyunsaturated fats and why modern conclusions depend on separating those trans-fat effects from true PUFA effects. A core thread is the distinction between the amount of LDL cholesterol, LDL particle number, and lifelong exposure: Mendelian randomization studies are used to argue that lifetime lowering of LDL strongly reduces cardiovascular risk, but that the magnitude of risk reduction from pharmacologic LDL lowering differs from what MR data would suggest because of timing and baseline exposure. The conversation then shifts to mechanistic detail, including how LDL oxidation, particle size, membrane fluidity, and APOB modifications influence retention in the arterial intima, macrophage engagement, foam cell formation, and plaque progression. The speakers stress that while polyunsaturated fats (seed oils) can alter lipoprotein composition and reduce the number of particles entering the arterial wall, they can also be more prone to oxidation once retained, though the overall net effect on cardiovascular risk tends to favor PUFA substitutions when trans fats are excluded. They address nutrition policy, processing effects, and the practical question of how to apply this to everyday choices, underscoring that focusing on seed oils alone ignores the bigger drivers of health such as caloric balance, fiber intake, physical activity, and overall diet quality. The dialogue also touches on the limitations of early nutritional experiments, the benefits and drawbacks of crossover designs, and the importance of converging lines of evidence across trials, MR studies, and cohort data. In closing, the speakers advise that if someone opts not to consume seed oils, they should still substitute with cardioprotective fats and not demonize foods outright, while recognizing that perfection is impractical given real-world dietary patterns and food marketing.

One manifestation of type 2 diabetes is non-alcoholic fatty liver disease, which can be exacerbated by excessive seed oil consumption. The rise in chronic diseases globally, including obesity in pets, correlates with increased refined grain intake and sedentary lifestyles. Unique populations historically consuming high-carb diets, like the Japanese and Tucasenta, have low obesity and diabetes rates, suggesting that seed oils may be a key factor in metabolic diseases. Research indicates that seed oils can lead to overeating by affecting brain pathways, similar to THC. No long-lived populations are known to consume high amounts of seed oils without health issues. The Israeli Paradox highlights health problems in populations consuming seed oils. Studies show that seed oils can induce insulin resistance and contribute to non-alcoholic fatty liver disease, which has surged in the U.S. since the 1980s. Chronic consumption of seed oils may lead to inflammation and oxidative stress, implicated in diseases like Alzheimer's. The Mediterranean diet, rich in monounsaturated fats, has shown benefits in reducing heart disease. Overall, reducing seed oil intake and focusing on healthier fats may improve health outcomes.