Barrie Quinn@portnoomarketgardenInstagram

Ultra-processed seed oils, like soybean, corn, sunflower, and canola, are often marketed as “heart-healthy,”

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what it claims

There's no evidence that seed oils (soybean, corn, sunflower, canola) cause inflammation or damage cell membranes in humans at normal consumption levels — the best current meta-analyses show the opposite or a neutral effect.

overstated

This post names no source and no type of evidence — no study, no author, no figure — which is itself worth flagging for a claim this specific (oxidation, cell-membrane disruption…

noli's read

This post names no source and no type of evidence — no study, no author, no figure — which is itself worth flagging for a claim this specific (oxidation, cell-membrane disruption, inflammation). Against that, independent literature says the opposite of what's claimed: two controlled-trial meta-analyses (2012, 2017) find no significant effect of linoleic acid — the dominant fatty acid in seed oils — on blood inflammatory markers, and a 2025-2026 Frontiers in Nutrition review concludes most human evidence supports a favorable, not harmful, role for linoleic acid in cardiometabolic risk. The industrial-refining argument has a real kernel — oxidized oil reused repeatedly at high heat can produce unwanted compounds — but that's a problem of repeated high-heat frying, not an intrinsic property of seed oils: the same misused olive oil would cause the same issue.

the sources

No named source held this one up — that absence is part of the verdict.

Claimed by Barrie Quinn. Noli grades the claim, never the person.

Decoded by Noli · August 3, 2026 · the original post

Barrie Quinn in the Register1 claims gradedSee their record →

Others on this

Cutting back on the classic ultra-processed staples (soda, packaged chips, sugary cereal) remains one of the better-supported dietary levers — just without the drama: the long-term risk association is real and reproduced, not an immediate sentence for one indulgence now and then.

mixedSanta Cruz Paleo

If you use protein powder, pair it with whole foods for fiber, and choose it on quality criteria: a short ingredient list, no unnecessary sweeteners or additives, and third-party testing.

holds upThe Doctor's Kitchen

If you deep-fry often or eat restaurant fried food regularly, favor a more heat-stable oil (olive, avocado) over reusing the same oil repeatedly or pushing it to very high heat: repeated heat and reuse are the real issue, not seed oil itself.

mixedPaul Saladino, MD

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