Collection of links to material about cholesterol, "a waxy, fat-like substance that occurs naturally in all parts of the body. ... High levels of cholesterol in the blood can increase your risk of heart disease." Topics include diagnosis, treatment (such as statins), prevention, screening, and clinical trials. Also includes material for children, teenagers, women, and seniors. From the National Library of Medicine (NLM) and the National Institutes of Health (NIH).