Cholesterol levels in the blood are of great concern to many adults Cholesterol levels of less than 200 mg/dL are considered desirable whereas cholesterol levels of 200 mg/dL or higher are considered to be too high People with high biood cholesterol levels runamuch greater risk for heart disease and stroke than people with low cholesterol levels. People with high levels should seek advice from their physician, reduce their intake of foods rich in cholesterol and other fats and increase their level of exercise. Some people with high cholesterol levels may have to take medication to reduce their cholesterol levels LDL is considered to be bad because, when in excess, it depos its cholesterol in arterial walls on the other hand, HDL is considered to be good because it transports cholesterol from the tissues via blood to the liver for removal from the body in the bile. A high HDU LDL ratio is related to a lower risk for heart disease. Aerobic exercise is one way to elevate blood levels of HDL