Cardiovascular

HDL Cholesterol

The 'protective' cholesterol that carries plaque away from arteries — low HDL is a cardiovascular risk marker.

Optimal targetMen > 40 mg/dL · Women > 50 mg/dL

What it measures

HDL (high-density lipoprotein) is often called 'good cholesterol' because it performs reverse cholesterol transport — carrying cholesterol from peripheral tissues and artery walls back to the liver for excretion. Higher HDL is generally associated with lower cardiovascular risk.

However, HDL function matters as much as HDL quantity. Extremely high HDL is not always protective, and very low HDL often signals insulin resistance or metabolic syndrome.

Why it matters

  • Performs reverse cholesterol transport, removing cholesterol from arteries.
  • Low HDL is a marker of insulin resistance and metabolic syndrome.
  • The triglyceride-to-HDL ratio is a powerful free proxy for insulin sensitivity.
  • Most useful when interpreted alongside triglycerides and LDL-C.

What affects your levels

Physical activity and cardiorespiratory fitness (raises HDL)
Dietary fat quality (omega-3s raise HDL)
Smoking (lowers HDL)
Insulin resistance and metabolic syndrome
Genetics

How VitalDrop tracks it

  • Measured alongside triglycerides so the insulin-sensitivity ratio can be calculated.
  • Monthly trends show whether exercise and diet changes are improving HDL.
  • Paired with LDL-C and hs-CRP for a complete cardiovascular profile.

Related biomarkers

Frequently asked questions

Not necessarily. While low HDL is a clear risk marker, extremely high HDL is not always protective — HDL function (its ability to perform reverse cholesterol transport) matters as much as quantity. The most actionable use of HDL is in the triglyceride-to-HDL ratio, a strong proxy for insulin sensitivity.

References & sources

01.
HDL Cholesterol and Cardiovascular Risk. Journal of the American College of Cardiology, 2020.
02.
Triglyceride-to-HDL Ratio and Insulin Resistance. Atherosclerosis, 2018.
Medically reviewed by
DH
Reviewed by Dr. Hassan Nasser
Medical Director — www.detroitfacemd.com

Board-certified facial plastic & reconstructive surgeon; clinical reviewer for VitalDrop laboratory insights. Verified at www.detroitfacemd.com

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Medical disclaimer: This content is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. VitalDrop provides laboratory test results and educational insights for wellness tracking. Always consult a qualified healthcare provider regarding abnormal or concerning results. Results and AI-assisted summaries are not a medical diagnosis.