Your profile shows cholestérol ratios a little high. I think it is not alarming right now but it could become if you go on increasing them. Remember that sport contributes to lower cholesterol and also cutting down with smoking. One causative factor that stands out continuously above and beyond all others is fat in the diet. And it is this factor that we can control. These fats from our foods enter our blood stream where, like sharks cruising about, they seek out the weak or vulnerable spots in the arteries. It was seen that inevitably the special fat-fighting cells are themselves engulfed by the repeated tidal waves of cholesterol and fats washed into the blood and artery walls by fat-containing foods such as butter, eggs, cream, milk, meat fats, and other animal fats in our diet. Why is the epidemic particularly strong in the U.S.A.? If you are a typical American, whether you know it or not you consume an unbalanced, obesity-producing diet. People have been urged to eat the right foods and to provide plenty of meat, eggs, milk, and cheese for their children. In most areas of the world, this problem of getting enough nourishing food to eat is still of primary importance. But it is not the problem in America. Our problem is somewhat the opposite: living too high on the hog. Our diet is too rich in fat as well as calories, refined sugars, starches, and oils. At the same time, it is low in essential nutriments, minerals and other vital requirements. We are all agreed: the cholesterol found in the blood is made largely in the liver from fats in the diet. It is also believed that cholesterol is produced in the arterial walls themselves. But the main source and the one that we can to a great extent control is fat in our food.