What Is a Normal LDL Value?

LDL, low-density lipoprotein, is often referred to as the "bad" cholesterol. It's composed of fat and protein. Because cholesterol does not dissolve in blood, it is carried by lipoproteins (LDL and HDL or high-density lipoprotein) to various tissues in your body.

Why is LDL the "Bad" Cholesterol?

• When too much LDL circulates in your blood, it clogs the arteries where blood flows to your heart and brain. If a narrowed artery becomes clogged, you can suffer a heart attack or stroke.

Tests

• Obtaining a valid blood sample requires a 12-hour fast before your appointment. The LDL test is part of a comprehensive lipid analysis, which also checks for HDL (the "good" cholesterol), and triglycerides.

Ranges

• LDL levels generally fall within five ranges:
  Optimal--less than 100 mg/dL
  Near optimal--100 to 129 mg/dL
  Borderline high--130 to 159 mg/dL
  High--160 to 189 mg/dL
  Very high--190 mg/dL and higher

Significance

• If you have a history of heart disease, you are considered at high risk and should strive for an LDL level of lower than 70 mg/dL.

Consideration

• An appropriate LDL cholesterol level really depends on your overall risk factors, e.g., cardiovascular disease, atherosclerotic disease, diabetes, cigarette smoking, and hypertension.