If you swap just a little bit of butter or fatty meat in your diet with healthier fats like those in nuts or fish, you might lower your bad cholesterol and reduce your risk of heart disease by a small amount.

If you swap out a little bit of butter or fatty meat for foods like nuts or vegetable oils, you're less likely to have a heart attack or die from heart disease.

Eating less saturated fat, like from butter and red meat, tends to go along with lower levels of 'bad' cholesterol in the blood.

If you swap out butter and fatty meats for oils like olive or sunflower oil, you might slightly lower your chance of having a heart problem — but the evidence isn’t super strong.

When kids eat less butter and more olive oil or fish, their bad cholesterol goes down — especially if they were eating a lot of saturated fat to begin with.

If you swap out trans fats (like in fried foods) for healthy fats like those in fish or nuts, your risk of heart disease drops a lot—what you replace it with matters more than just cutting fat.