Low-density lipoprotein (LDL): This is called “ bad cholesterol” because it can build up in your arteries, leading to heart disease and stroke. The liver then removes it from your body. High-density lipoprotein (HDL): This is called “ good cholesterol” because it takes cholesterol from your blood back to your liver. Cholesterol is carried around the body by special proteins in the blood called “lipoproteins.” The lipoprotein level is what’s measured when you have a cholesterol test. Some of the important jobs that cholesterol does include:Īcting as a building block for all steroid hormones (like estrogen and testosterone)Ĭholesterol comes from animal products in the diet. Cholesterol is useful when it’s found in the right places. Cholesterol is a fatty substance that is used in every cell in your body.
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