The seed oil panic has achieved full institutional legitimacy. … The January 2026 dietary guidelines — which discarded 421 pages of scientific recommendations from the advisory committee — now list butter and beef tallow alongside olive oil as acceptable cooking fats.
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As a clinical dietitian who works with cardiac patients every day, I want to offer something the panic doesn’t have: something slower and less influencer friendly. Let’s talk about what the evidence actually shows.
First, “seed oils” is a marketing term, not a nutritional category. What we’re actually talking about are vegetable oils high in polyunsaturated and monounsaturated fats — the kinds of fats that, in decades of research, are associated with lower rates of cardiovascular disease when they replace saturated fat in the diet.
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The core claim of the seed oil panic is that linoleic acid — an omega-6 fatty acid in these oils — drives systemic inflammation, which drives chronic disease. It sounds plausible. But “sounds plausible” and “is demonstrated in humans at dietary exposure levels” are different things. Randomized controlled trial evidence does not support this claim.
