We don’t know yet if swapping butter and fatty meats for olive oil and avocados makes your heart healthier or not—there’s just not enough clear proof either way.

Eating foods rich in monounsaturated fats, like olive oil or avocados, doesn't seem to make heart disease risk higher or lower based on this analysis.

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.

We don’t have enough reliable data yet to say if swapping butter for bread or olive oil makes a difference in heart disease risk, because not enough studies provided the right information.

We don’t know yet if swapping butter for bread or olive oil makes a difference for heart health — there just isn’t enough solid data from long-term studies to say for sure.

For people who already have heart disease, eating foods high in saturated fats—like butter or red meat—doesn’t seem to make their chances of having a heart attack or dying any higher or lower.