For decades, health authorities and many experts have supported the hypothesis that heart diseases are caused by fats and cholesterol that "clog" the coronary arteries. As a result, lowering cholesterol levels has become an extremely lucrative business, and cholesterol-lowering statins are now the most commonly prescribed medications worldwide. Millions of people have been labeled as patients in need of such drugs. However, the medical guidelines derived from the cholesterol hypothesis are increasingly being criticized: doctors and researchers are questioning the role attributed to cholesterol in heart diseases. We now know that heart patients often do not have high cholesterol levels, and even proponents of the cholesterol hypothesis must admit that there is no ideal cholesterol level for everyone. Broad studies confirm this.