High-density lipoproteins, or HDLs, are one of the five major groups of lipoproteins, which are complex particles that are composed of multiple proteins. Lipoproteins transport all fat molecules around the body within the water outside of the cells.
HDLs are directly involved with the transport of cholesterol and in high doses are associated with a decreased risk of atherosclerosis and heart attack. This is why high-density lipoproteins are often referred to as the “good cholesterol.”
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