JUAN GAERTNER / SCIENCE PHOTO LIBRARY JUAN GAERTNER / SCIENCE PHOTO LIBRARY
Cholesterol molecular model. Cholesterol is a sterol, a type of lipid, a class of biochemical compounds that includes fats. Cholesterol is an essential component of the cell membranes in mammals, and levels of cholesterol in the blood is an important health indicator. Cholesterol is a precursor for the biosynthesis of several steroid hormones and bile acids.
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