Life Kit Are seed oils really bad for you? Researchers unpack RFK Jr.'s claims
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Jul 31, 2025 
Maria Godoy, an NPR health correspondent, engages with nutrition and fatty acids scientists to dissect claims about seed oils, particularly those made by Robert F. Kennedy Jr. They explore the extraction processes of these oils and the debate surrounding their health implications. The conversation dives into the balance of omega-6 and omega-3 fats, emphasizing individual dietary needs. Listeners learn about the effects of ultra-processed foods on health and the case for whole foods rich in omega-3s as a healthier choice.
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What Are Seed Oils?
- Seed oils are extracted from seeds like canola, corn, and soybean and typically refined using hexane to maximize oil extraction.
- This chemical refining process distinguishes them from non-seed oils like extra virgin olive oil, which are cold-pressed, not refined.
Trace Hexane Residue in Seed Oils
- Seed oils may contain trace amounts of hexane residue from refining, but federal toxicologists consider these levels toxicologically insignificant.
- Any residual hexane usually evaporates during cooking, reducing health concerns for most consumers.
Omega-6 and Inflammation Myth
- Seed oils are high in omega-6 fatty acids, which can promote or neutralize inflammation unlike the simple theory suggests.
- Human trials show omega-6 intake from seed oils does not increase inflammation markers in the body.