These days, drug companies and health professionals alike are focusing their attention on cholesterol in the blood  The more cholesterol we have in our blood, the higher the risk that we shall die of a heart attack  The issue is pertinent since heart disease kills more North Americans every year than any other single cause
At least three factors -- smoking, drinking, and exercise -- can each influence levels of cholesterol in the blood
The risk of fatal heart disease can be altered by certain changes in lifestyle.