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Cholesterol

By Jennifer Moll, About.com

Updated: September 25, 2008

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Definition: Cholesterol is a fat-like substance (lipid) circulating in the blood of all humans. Most of the cholesterol in your body is made by the liver, however, some cholesterol can also be obtained through diet.

Cholesterol has many uses in the body, including giving strength to cellular membranes, insulating neurons, and helps to make steroid hormones, like estrogen and testosterone.

Also Known As: fat
Common Misspellings: colesterol
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