A lipoprotein test measures the levels of lipoproteins in your blood, which carry cholesterol and triglycerides. It helps assess your risk for heart disease. The test typically includes LDL (bad cholesterol), HDL (good cholesterol), total cholesterol, and triglycerides. Normal ranges are: LDL below 100 mg/dL, HDL above 60 mg/dL, total cholesterol below 200 mg/dL, and triglycerides below 150 mg/dL. Results are usually available within a day.