Cholesterol is a fatty substance (or a lipid) that is an important part of the outer lining of cells in the body of animals. In the blood circulation of humans, there is also cholesterol. There are two major sources for the cholesterol in a person s blood dietary intake and liver production. The liver production is a natural one, so it does not present any kind of threat to the human body. Dietary cholesterol on the other hand, is the one that can be harmful. Dietary cholesterol mainly comes from fish, poultry, meat and dairy products. The liver is capable of manufacturing cholesterol and secreting cholesterol into the blood circulation as well as removing cholesterol from the blood circulation.
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