Saturated fats (animal fats like those found in milk, beef, pork, chicken, etc) is the leading cause of high levels of cholesterol in the blood. High cholesterol is the leading cause of coronary artery disease, witch in turn is the leading cause of heat attack or stroke. This is the #1 cause of death in USA, accounting for over 25% of all deaths. This nutritional science has been known since the 1980s. Why is America still eating cheese burgers?