Cholesterol is a substance produced by the body and is present in certain foods. Cholesterol, similar to wax in consistency, is an important part of cell growth and the functions of the body. This important substance becomes a problem when there is too much of it in the body. Low-density lipoprotein (LDL) is called "bad" cholesterol and can harm your body when levels are high. High-density lipoprotein (HDL) is good and, according to the American Heart Association, can decrease the risk of heart disease.
HDL Levels in Men
Cholesterol is measured through a blood test and is written as "mg/dL," (milligram per deciliter). Normal levels of HDL in men measure below 40 mg/dL.
HDL Levels in Women
Healthy levels of HDL should fall below 50 mg/dL in women. Daily exercise and being tobacco-free can raise HDL levels.
HDL Levels in Children
Normal HDL for children under the age of 19 years old is less than 35 mg/dL.
LDL Levels in Adults
Normal readings for LDL, or the "bad" cholesterol in adults is under 100 mg/dL. "Above optimal" and "borderline" readings range from 100 to 159 mg/dL, with "high" cholesterol defined as more than 160.
LDL Levels in Children
Children's LDL levels should be less than 100 mg/dL. Readings of 130 or higher indicate high cholesterol.
