Non-HDL Cholesterol

Overview

Non-HDL cholesterol measures the cholesterol content in all atherogenic lipoproteins (LDL + VLDL + IDL + lipoprotein(a)) calculated as total cholesterol minus HDL cholesterol. These particles transport cholesterol to peripheral tissues and contribute to atherosclerotic plaque formation; non-HDL-C reflects total atherogenic burden more comprehensively than LDL-C alone. Elevated levels indicate increased cardiovascular risk; low levels are desirable. Clinically, non-HDL cholesterol provides superior risk assessment across triglyceride ranges and guides lipid therapy targets without requiring fasting.

Clinical Use Cases

  • Cardiovascular risk assessment in hypertriglyceridemia (>200 mg/dL).
  • Primary and secondary prevention of atherosclerotic cardiovascular disease.
  • Treatment target for statin therapy (30 mg/dL higher than LDL-C goal).
  • Identifying residual risk despite optimal LDL cholesterol control.

Specimen Types

  • Serum.
  • Plasma (EDTA, heparin).

Measurement Methods

  • Calculation: Total cholesterol minus HDL cholesterol.
  • Direct lipoprotein subfraction assays (research).

Test Preparation and Influencing Factors

  • Non-fasting acceptable; triglycerides <200 mg/dL preferred for accuracy.
  • Recent meals minimally affect non-HDL compared to calculated LDL.
  • Hypertriglyceridemia (>400 mg/dL) may underestimate non-HDL.
  • Pregnancy and acute illness transiently elevate levels.

Synonyms

  • Non-HDL-C.
  • Total atherogenic lipoproteins.
  • Cholesterol minus HDL.

Further Reading