A level-headed look at the seed oil debate, what the evidence actually says, and how THE FAD scores them without the hysteria.
5 min read
Few ingredients have gone from kitchen staple to internet villain as fast as seed oils. Scroll far enough and you'll find claims that they're the single cause of modern chronic disease. Scroll the other direction and you'll find dietitians rolling their eyes at the whole conversation.
Seed oils — canola, sunflower, soybean, corn — are high in omega-6 fatty acids. Omega-6s aren't inherently harmful; they're essential fats your body needs. The concern isn't the oil in isolation, it's the ratio: most modern diets are heavy on omega-6 and light on omega-3, and that imbalance is one of several factors associated with a more pro-inflammatory internal environment.
The bigger issue is usually context. Seed oils show up overwhelmingly in ultra-processed, deep-fried and reheated foods — so when research links them to worse outcomes, it's often hard to separate the oil itself from everything else riding along with it.
Rather than treating seed oils as forbidden, THE FAD's Food signal looks at the whole picture: how processed the meal is, its omega-3-to-omega-6 balance, and how much sugar and refined starch travel alongside it. A stir-fry made with a neutral oil and loaded with vegetables scores very differently from a bag of fried snack food — even if both technically contain "seed oil."
The practical takeaway: don't panic about a bottle of cooking oil in your pantry. Pay attention to how much of your diet comes from deep-fried, heavily processed food — that's the pattern actually worth tracking.
THE FAD