Swapping saturated fats (like butter) with certain vegetable oils doesn't change how long people live overall, according to research studies.

Swapping saturated fats (like butter) with certain vegetable oils in your food doesn't really lower your chances of having heart problems or dying early, according to big studies.

Eating a bit more healthy fats like those in nuts and fish—replacing things like carbs or saturated fats—might help people live longer and lower their chances of dying from heart disease or cancer.

People in the U.S. who eat more of the healthy fats (like those in fish and nuts) compared to their total fat intake tend to live longer, even if they eat the same amount of fat overall — and this holds true no matter their age, gender, income, or health habits.

Eating less saturated fat (like butter and fatty meats) and more healthy fats (like olive oil, nuts, and fish) is linked to people living longer and having fewer heart problems or other serious illnesses.

Some studies said swapping certain fats in your diet is good for heart health, but they might have been wrong because other factors like different medicines or other diet changes messed up the results.