Medicine: Good v. Bad Cholesterol

At last, a fatty molecule that may help your heart

Cholesterol has been portrayed as a kind of coronary time bomb. One study after another has shown that people with the highest concentration of the fatty molecule in their bloodstreams run the greatest risk of atherosclerosis. This is the buildup of fibrous fatty plaques in the blood vessels and a precursor of heart disease—the leading cause of death in the U.S. Hence, the reduction of blood (or serum) cholesterol has become a prime goal of doctors and patients alike. Still, physicians have been puzzled by one observation: though some patients show a...

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