The seed oil panic is hurting my cardiac patients

Summary

She came in wanting to do right by her husband. He’d been losing weight — the kind of weight loss that says something’s wrong — and she’d spent weeks trying to reverse it. Cream in his coffee, butter in his soups, all the gristle he could handle. She’d read somewhere that fat was the most calorie-dense food she could give him, and she was right. She’d also read that seed oils were toxic, that the real enemy was vegetable oil, that we were supposed to be eating traditional animal fats all along. By the time she was admitted herself — heart procedure, blood pressure that had been climbing for months, both of them now taking turns as patients — she told me she suspected the diet hadn’t helped. In the quiet space between us, there wasn’t room left to argue. This is happening constantly now, and it’s only going to accelerate. 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. 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,...