High cholesterol: Is when you have too much

High cholesterol is when you have too much cholesterol in your blood, which can increase your risk of heart attack or stroke. Learn about the types of cholesterol, how to get a test, and how to lower your levels with lifestyle changes and medication. Cholesterol is a type of lipid (fat), a waxy substance that helps build and maintain your cells, hormones, and some vitamins. But too much cholesterol can be a problem. People with high ... High cholesterol often has no symptoms, but can lead to serious health issues. Learn about HDL and LDL cholesterol, risk factors, and treatment. Your body needs some cholesterol, but too much can raise your risk of heart disease. Know the types (HDL and LDL), and how to lower high cholesterol.