You probably know less about cholesterol than you think you do. Here's some help.

Confusion about cholesterol is common: Surveys of adults around the world show that although most people are concerned about their cholesterol, fewer than half know recommended cholesterol levels or understand what those numbers mean for their health. Dariush Mozaffarian, associate professor of medicine, and Paul Ridker, the Eugene Braunwald Professor of Medicine, both of Brigham and Women's Hospital, are quoted.

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