Despite being the internet's villain of the moment, the evidence does not show that seed oils are harmful in normal amounts — and in many studies they look better for your heart than butter or beef tallow. The real issue isn't the oil itself; it's the ultra-processed food it often turns up in. Here is the honest, fear-free version.
The seed oil panic
Seed oils — canola, sunflower, soybean, safflower — have been blamed online for inflammation and all sorts of modern ills, with beef tallow and butter held up as the "natural" alternatives. It's a compelling story. It's just not well supported by the research.
What the evidence actually says
Large reviews consistently find that replacing saturated fat (butter, tallow) with unsaturated fats (including seed oils) is linked to lower, not higher, heart-disease risk. The "seed oils cause inflammation" claim mostly comes from lab studies using doses far beyond what anyone eats. In realistic amounts, they're fine — and notably, surveys show only about 1 in 10 people are actually worried about them.
Seed oils vs butter and tallow
| Fat | Mostly | Evidence in normal amounts |
|---|---|---|
| Seed oils | Unsaturated | Neutral-to-beneficial vs saturated fat |
| Butter | Saturated | Fine in moderation, no health "win" over seed oils |
| Beef tallow | Saturated | Trendy, but not the upgrade it's sold as |
None of these is poison. None is a superfood. Amount matters more than which one.
The real issue: what they're in
Here's the nuance the debate misses: seed oils are everywhere in ultra-processed foods — crisps, fried fast food, packaged snacks. If those make up a lot of your diet, the problem is the whole package (refined carbs, salt, calorie density), not the oil specifically. Learn to spot them in what ultra-processed really means and how to read a food label.
This is exactly why a single scary ingredient is the wrong thing to fixate on — see why "is this healthy?" is the wrong question.
Judge the whole food, not one ingredient
forme scores a food on what actually matters for your goals — not internet panic about a single ingredient. An honest number, with the reasons behind it.
The bottom line
Seed oils are not the villain they're made out to be; in normal amounts they're fine, and often a better swap than butter or tallow. Cooking at home with a bit of any oil is not your problem — a diet built on ultra-processed food is. This is general information, not medical or dietary advice.