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.

If you eat less saturated fat for two years or more, it probably won’t make you live longer or stop you from dying of heart disease — at least not in countries with lots of food and healthcare.

If adults eat less saturated fat, they’re probably 21% less likely to have a heart attack, stroke, or other heart-related problems — but it doesn’t seem to change how long they live.

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.

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.

Cutting down on all fats in your diet—no matter what kind of carbs you eat—won’t make you any less likely to get heart disease over eight years.