Fat

A major source of energy in the diet, fat helps the body absorb fat-soluble vitamins, such as vitamins A, D, E, and K. Some kinds of fats, especially saturated fats and trans fatty acids, may raise blood cholesterol and increase the risk for heart disease. Other fats, such as unsaturated fats, do not raise blood cholesterol. Fats that are in foods are combinations of monounsaturated, polyunsaturated, and saturated fatty acids.