Hypercholesterolemia, additionally called elevated cholesterol, is the nearness of significant levels of cholesterol in the blood. It is a type of hyperlipidemia, high blood lipids, and hyperlipoproteinemia (raised degrees of lipoproteins in the blood).

Raised degrees of non-HDL cholesterol and LDL in the blood might be a result of diet, corpulence, acquired (hereditary) infections, (for example, LDL receptor changes in familial hypercholesterolemia), or the nearness of different illnesses, for example, type 2 diabetes and an underactive thyroid.