Fat

Research shows that eating too many high-fat foods contributes to high blood cholesterol levels. This can cause hardening of the arteries, coronary heart disease and stroke. High-fat diets may also contribute to a greater risk for some types of cancer, particularly cancers of the breast and colon.

While most Americans get more than 40 percent of their daily calories from fat, the American Heart Association recommends limiting fat to less than 30 percent of daily calories. This means limiting the fast you consume to 50-80 grams per day.