Choose healthy fats, limit saturated fat, and avoid trans fat.

The total amount of fat you eat, whether high or low, isn't really linked with disease. What really matters is the type of fat you eat. The "bad" fats—saturated and trans fats—increase the risk for certain diseases. The "good" fats—monounsaturated and polyunsaturated fats—lower disease risk. The key to a healthy diet is to substitute good fats for bad fats—and to avoid trans fats. Although it is still important to limit the amount of cholesterol you eat, especially if you have diabetes, dietary cholesterol isn't nearly the villain it's been portrayed to be. Cholesterol in the bloodstream is what's most important. And the biggest influence on blood cholesterol level is the mix of fats in your diet—not the amount of cholesterol you eat from food.