Cholesterol is not all bad; you need it to help make hormones, vitamin D and substances that aid in the digestion of fats. But your body already makes enough to do these jobs. There's also cholesterol in food, but it's the saturated and trans fats in the food you eat that cause your body to make too much cholesterol. The publication "Dietary Guidelines for Americans, 2010" suggests you limit your intake of dietary cholesterol to under 300 milligrams a day. Additionally, the American Heart Association suggests you keep saturated fat intake to less than 5 percent to 6 percent of total calories and reduce percent of calories from trans fats.
Low-density lipoprotein, the "bad" cholesterol, travels through your blood and sticks to artery walls, which causes them to narrow and increases risk of heart disease. High-density lipoprotein takes cholesterol to your liver, where it is processed and eliminated from your body.
Fat travels in your bloodstream via triglycerides, which also affect cholesterol levels. In your blood and liver, triglycerides combine with proteins to make cholesterol. Keeping your triglyceride numbers down may also benefit your cholesterol numbers.