The Proof with Simon Hill

Seed Oils: Dangerous or Misunderstood? Bill Harris, PhD on the Truth About Omega-6 fats


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Are seed oils actually harmful? Or is this just another wellness myth gone viral?


In this episode, I sit down with Dr. Bill Harris - leading expert on dietary fats - to unpack the science on linoleic acid, an omega-6 fat found in nuts, seeds, and vegetable oils.


We explore the rise of seed oil fear-mongering, the truth about inflammation, cholesterol, oxidation, and why outcome data—not mechanisms—should guide our thinking.


  • Omega-6 Fats and Health Overview (00:00)
  • Why the Review Was Updated (01:22)
  • What Is Linoleic Acid? (06:47)
  • Linoleic Intake Over Time & Health Links (12:45)
  • Research Methods and Key Evidence (16:25)
  • Omega-6 and Inflammation Explained (41:00)
  • Common Myths About Seed Oils (44:37)
  • The Oxidation Concern with Seed Oils (49:20)
  • Omega-6 vs Omega-3: The Real Story (53:39)
  • Blood Sugar, Insulin & Linoleic Acid (01:03:48)
  • Heart Health and Linoleic Benefits (01:05:44)
  • Cancer Risk and Seed Oils (01:13:49)
  • Public Health and Future Research (01:16:55)
  • How to Use Vegetable Oils Wisely (01:25:17)
  • Wrap-Up and Takeaway Advice (01:32:22)

  • If you’ve been confused by the seed oil debate, this one’s for you.


    Visit The Proof website for the full show notes and supporting studies.


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    Simon Hill, MSc, BSc (Hons)

    • Creator of theproof.com

    • Host of The Proof with Simon Hill

    • Author of The Proof is in the Plants

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