If you swap out foods like butter and cheese for sugary snacks and white bread, it might make your heart health worse by raising bad fats in your blood, lowering good cholesterol, and making your body less sensitive to insulin—which could raise your chance of having a heart attack.

If you swap out foods like butter and cheese for things like white bread and sugary snacks, it might raise your blood sugar and fat levels after meals, which could make your heart more likely to get sick.

Switching from foods high in saturated fat (like butter) to foods full of sugar and white bread doesn’t make your heart any safer — studies show it doesn’t help prevent heart disease.

Eating less sugary, processed carbs and more healthy fats like those in nuts and olive oil might help lower your risk of heart disease, especially if you're older, female, not very active, or overweight.

If you swap out foods high in saturated fats (like butter or cheese) for sugary snacks and drinks, it might mess up your blood fats in a bad way—raising triglycerides, lowering good cholesterol, and raising total cholesterol—which could make your heart more at risk.

If you swap out butter or oil for sugary white bread or pastries, it won’t lower your risk of heart disease—and might even raise it if you’re prone to blood sugar problems.