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High blood cholesterol is diagnosed by checking the cholesterol levels in your blood.
A cholesterol level test is a blood test that measures the levels of cholesterol in the blood that can help show whether you are at risk for coronary artery disease (CAD). It is also referred to as a lipoprotein panel, lipid panel or lipid profile.
Before the test, you’ll need to fast (not eat or drink anything but water) for 9 to 12 hours.
The lipoprotein panel will give your doctor information about your:
If it’s not possible to have a lipoprotein panel, knowing your total cholesterol and HDL cholesterol can give you a general idea about your cholesterol levels.
Testing for total and HDL cholesterol does not require fasting. If your total cholesterol is 200 mg/dL or more, or if your HDL cholesterol is less than 40 mg/dL, your doctor will likely recommend that you have a lipoprotein panel. (Cholesterol is measured as milligrams (mg) of cholesterol per deciliter (dL) of blood.)
NOTE: All values in this section are for adults only and do not apply to children.
The list below shows ranges for total cholesterol, LDL ("bad") cholesterol, and HDL ("good") cholesterol levels after 9 to 12 hours of fasting.
Triglycerides also can raise your risk for heart disease. If your triglyceride level is borderline high (150–199 mg/dL) or high (200 mg/dL or higher), you may need treatment.
Factors that can raise your triglyceride level include:
Your doctor or health care provider will discuss your results with you. He or she will advise you further if your results are outside the desirable range.
Reference: The National Heart, Lung and Blood Institute
Last updated April 27, 2017