May 25, 2026 08:10 PM
https://www.statnews.com/2026/05/22/seed...ac-health/
EXCERPTS: The seed oil panic has achieved full institutional legitimacy. Robert F. Kennedy Jr. has called canola, corn, soybean, sunflower, cottonseed, and grapeseed oils the most unhealthy aspect of the American diet. 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.
Then came the food companies: Steak ’n Shake “RFK’d” its fries, PepsiCo announced it would phase canola and soybean oils out of Lay’s and Tostitos, with Kraft Heinz, General Mills, and Nestlé following with their own reformulation pledges. The food industry is responding, at great speed, to a story that is running well ahead of the evidence.
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...
[...] 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.
There’s a secondary argument about oxidation — seed oils go rancid at high heat, producing potentially harmful compounds. This idea is chemically real and worth being thoughtful about (don’t reuse frying oil repeatedly). But the evidence that oxidation at home-cooking levels causes measurable harm in humans isn’t there.
Some of what’s driving the seed oil panic isn’t wrong — it’s just misattributed. Ultra-processed food really is a problem. The National Institutes of Health published the first randomized controlled trial on ultra-processed food in 2019 (a landmark study by Kevin Hall’s team) showing that people randomized to an ultra-processed diet consumed about 500 more calories per day and gained weight, even when macronutrients were matched precisely. The food was engineered to override satiety — proven, not suggested.
But seed oils are not why ultra-processed food behaves that way. They are but one ingredient in a complex and highly engineered product designed to keep you eating past fullness. The oil isn’t the villain; the food product surrounding the oil is. Blaming seed oils for the harms of ultra-processed food is as helpful as blaming the wrapper.
There’s something else worth knowing about beef tallow that isn’t making it into the wellness content: It contains ruminant trans fats. They’re naturally occurring, present in all beef fat, and according to cardiologists, present in tallow at levels far above what’s considered safe... (MORE - missing details)
EXCERPTS: The seed oil panic has achieved full institutional legitimacy. Robert F. Kennedy Jr. has called canola, corn, soybean, sunflower, cottonseed, and grapeseed oils the most unhealthy aspect of the American diet. 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.
Then came the food companies: Steak ’n Shake “RFK’d” its fries, PepsiCo announced it would phase canola and soybean oils out of Lay’s and Tostitos, with Kraft Heinz, General Mills, and Nestlé following with their own reformulation pledges. The food industry is responding, at great speed, to a story that is running well ahead of the evidence.
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...
[...] 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.
There’s a secondary argument about oxidation — seed oils go rancid at high heat, producing potentially harmful compounds. This idea is chemically real and worth being thoughtful about (don’t reuse frying oil repeatedly). But the evidence that oxidation at home-cooking levels causes measurable harm in humans isn’t there.
Some of what’s driving the seed oil panic isn’t wrong — it’s just misattributed. Ultra-processed food really is a problem. The National Institutes of Health published the first randomized controlled trial on ultra-processed food in 2019 (a landmark study by Kevin Hall’s team) showing that people randomized to an ultra-processed diet consumed about 500 more calories per day and gained weight, even when macronutrients were matched precisely. The food was engineered to override satiety — proven, not suggested.
But seed oils are not why ultra-processed food behaves that way. They are but one ingredient in a complex and highly engineered product designed to keep you eating past fullness. The oil isn’t the villain; the food product surrounding the oil is. Blaming seed oils for the harms of ultra-processed food is as helpful as blaming the wrapper.
There’s something else worth knowing about beef tallow that isn’t making it into the wellness content: It contains ruminant trans fats. They’re naturally occurring, present in all beef fat, and according to cardiologists, present in tallow at levels far above what’s considered safe... (MORE - missing details)