Cholesterol is a waxy, fat-like, ring-structured chemical present in all cells in the body. It is acomponent of cell membranes and it is used for the synthesis of sex hormones, bile salts and vitaminD. North Americans consume approximately 400-500 mg/day in their diet. The body synthesizesapproximately 1,000 mg/day, mainly in the liver. Considerable amounts are also produced in theintestines. Cholesterol only endangers health if the concentration in the blood is elevated and if itinfiltrates arterial walls, narrowing the lumen, decreasing blood flow, and hence decreasing theamount of oxygen available. It must be stressed that fats (C, CE and TG) are essential to life, as anenergy source and as providers of essential fatty acids (CE and TG).