In men who already had heart problems, eating less fat didn’t help them live longer, even though their cholesterol went down.

Even though people who ate less fat had much lower cholesterol, they didn’t live longer or have fewer heart attacks than those who didn’t change their diet.

Eating less saturated fat didn’t help men who already had a heart attack live longer without another heart attack.

Cutting down on all fats in your diet—no matter if they’re healthy or unhealthy—won’t make a noticeable difference in whether adults get heart disease over eight years.

Eating less saturated fat—like butter or fatty meats—doesn’t seem to lower the risk of dying from heart problems or other causes, even after years of doing it, according to a review of nine big studies.

If adults in developed countries eat less saturated fat for at least two years, they’re probably less likely to have heart attacks, strokes, or need heart surgery—about 1 in 56 people would avoid one of these events over four years.