It’s not every week that peer-reviewed science catches up with what health rebels have been warning about for years. But a new population-level study published in Communications Medicine (July 2025) is shining a harsh light on omega-6 fats—the kind you’ll find lurking in most seed oils. The big question: Could our cooking oils be fueling the dementia epidemic?
The Alzheimer’s connection
Researchers analyzing global dietary data found that countries consuming more omega-6 PUFAs (the main fats in seed oils) also show higher rates of Alzheimer’s disease and related dementias. The numbers weren’t subtle either: a strong positive association that persisted across decades of data (1990–2019).
The study even modeled outcomes: cutting back omega-6 intake by ~4% of daily energy could lower dementia rates by 8% in the U.S. That’s not a niche effect, it’s a public health game-changer.
Read the full paper here.
Clip of the Week 🎥
This week’s clip is our breakdown of the new Alzheimer’s study—condensed, dynamic, and easy to share. If it resonates with you, please share it on your socials. Every post helps expand the movement and spread awareness of how seed oils are impacting our health.
The Industrial Diet vs. Your Brain
For decades, we’ve been told to swap animal fats for “heart-healthy” vegetable oils. But this new research adds fuel to a growing counter-narrative: excess omega-6 isn’t just a metabolic issue, it may also impair brain health.
🔑 Key takeaways from the study:
Not all fats are equal: Saturated fats, trans fats, and cholesterol also showed correlations with dementia, but omega-6 stood out as consistently problematic.
It’s not about individuals, it’s about populations: The study doesn’t prove that every tablespoon of canola oil leads to Alzheimer’s, but it highlights a worrying pattern when whole nations adopt seed-oil-heavy diets.
Brain at risk: Chronic inflammation and oxidative stress, known effects of high omega-6 intake,
are suspected pathways that could accelerate neurodegeneration.
💡 Bottom line: If the industrial diet is shaping the future of our brains, maybe it’s time to rethink what’s in our pan.
Help Us Build the Seed Oil-Free Knowledge Hub
This newsletter grows thanks to all of us. If you stumble on a scientific article, study, or resource that you think belongs in our database, share it with us—we’re building a library week by week to fuel smarter conversations.
👉 You can also check out the Stop Eating Seed Oils Reddit forum, a goldmine of organized, valuable discussions and sources.
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— The SeedOil.com Team