For most healthy adults (19 and older), your total cholesterol should be less than 200 mg/dL, your LDL less than 100 mg/dL, and your HDL greater than 40 mg/dL. For children (19 and younger), total cholesterol should be less than 170 mg/dL, LDL less than 110 mg/dL, and HDL greater than 45 mg/dL.