Eating more omega-6 fats—like those in vegetable oils—doesn’t appear to increase or decrease your risk of heart disease, based on this large review.

Taking omega-6 supplements, like those from sunflower or corn oil, doesn’t appear to protect against heart disease, according to clinical trial data.

People who eat more fish or other sources of omega-3s don’t seem to have much lower risk of heart disease, according to this review of many studies.

Taking fish oil supplements doesn’t seem to lower your risk of having a heart attack or other heart disease, according to this review of many clinical trials.

Eating more saturated fat—like in butter or red meat—doesn’t seem to make people more likely to get heart disease, based on this big review of studies.

If you swap out a little bit of butter or fatty meat for foods like nuts or vegetable oils, you're less likely to have a heart attack or die from heart disease.