This review looked at data from over 347,000 adults followed for an average of 14 years — so if saturated fat had even a moderate effect on heart disease, this study would have been able to find it.

Multiple large-scale meta-analyses of prospective cohort studies demonstrate no statistically significant association between dietary saturated fat intake and incidence of coronary heart disease or cardiovascular disease.

Some big studies that looked at lots of people who ate less saturated fat didn’t find that they lived longer or had fewer heart attacks, which makes people question why we’ve been told to avoid foods like butter and cheese for so long.

Eating less saturated fat doesn't seem to reliably help people live longer or avoid heart disease deaths, whether they're healthy or already have heart disease.

Eating foods high in saturated fat, like butter and red meat, doesn't appear to raise your risk of heart attacks, strokes, or other heart problems, according to a big review of long-term studies on thousands of people.

Overall, eating more saturated fat doesn't seem to increase your risk of having any kind of heart disease or stroke, according to a large review of 21 long-term studies.