Why is it risky to have low levels of HDL cholesterol?

David C. Fiore, MD on behalf of Univ. of Nev. School of Medicine, Family Medicine

Family Medicine

A low level of HDL (high-density lipoprotein) cholesterol limits the body's ability to protect blood vessels from the damage of LDL (low-density lipoprotein) cholesterol and increases the risk of stroke and heart attacks. HDL cholesterol helps the body metabolize and get rid of LDL cholesterol and other harmful forms of lipids.

Intermountain Healthcare

Too little high-density lipoprotein (HDL, or "good" cholesterol) in your bloodstream can also increase your heart risk. That's because HDL cholesterol removes some of the bad low-density lipoprotein (LDL) cholesterol from the artery walls -- preventing or slowing the buildup of dangerous plaque. You want high levels of this "good" HDL to help keep your arteries clear -- and your heart protected.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.

Cholesterol

We need cholesterol, a fatty, waxy substance because our cells use it to form the membrane -- a critical part of the cell. But because it is fatty, it does not dissolve in the blood, but is carried to your cells by certain proteins. We get concerned about cholesterol when there is too much of it, particularly when there is too much "Low-Density Lipoprotein" or LDL cholesterol. This type of cholesterol is one of the major risk factors for coronary heart disease. On the other hand, there is High-Density or HDL cholesterol, which is "good" cholesterol, and good levels of HDL are associated with less risk of stroke and heart attack.

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