Whether you're a man or woman, young or old, swapping fats in your diet seems to affect your heart disease risk in the same way, according to this analysis.

Whether you're young or old, male or female, eating more saturated fat doesn't seem to affect your heart disease risk any differently, according to this big review.

Eating more saturated fat, like butter or fatty meat, doesn't seem to raise your risk of heart disease, according to a big review of 16 long-term studies of adults.

For people who haven't had a heart attack yet, how much fat they eat doesn't seem to affect their chance of dying from heart disease, according to combined data from several long-term studies.

Eating more fat in your diet doesn't seem to make you more likely to die from heart disease, according to long-term studies of nearly 90,000 people.

Eating more saturated fat — like in butter or red meat — doesn't appear to raise the chance of dying from heart disease, based on long-term studies of nearly 90,000 people.