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HDL Cholesterol: What Your Number Means

HDL cholesterol is the good cholesterol on your lipid panel. Higher HDL has long linked to lower heart risk, but drugs that raise HDL haven't prevented heart attacks, so clinicians read HDL as a marker of metabolic health and aim treatment at LDL-C and ApoB.

What is HDL cholesterol?

HDL (high-density lipoprotein) carries cholesterol away from artery walls and back to the liver, a process called reverse cholesterol transport. That job earned the good cholesterol nickname, and large observational studies consistently link higher HDL to lower cardiovascular risk.

What is a good HDL level?

A good level is above 40 mg/dL for men and above 50 mg/dL for women, and 60 or higher has traditionally counted as protective. Very high levels add no extra protection.

  • Low and worth looking into: below 40 mg/dL in men, below 50 mg/dL in women
  • Traditionally protective: 60 mg/dL or higher
  • Extremely high (roughly 97 mg/dL and up in men, 116 and up in women): linked to higher all-cause death rates in two large Danish population studies, a U-shaped curve

What does low HDL mean?

Low HDL links to higher heart risk, but it usually travels with other risk factors (high triglycerides, insulin resistance, excess weight) that do much of the damage. Treat it as a cue to look at your whole metabolic picture.

On its own, low HDL doesn't call for medication. No single HDL number, high or low, outweighs your LDL-C and ApoB in deciding treatment.

Does raising HDL lower heart risk?

Not with the drugs tested so far. Several classes were built to raise HDL on the reasonable idea that raising it should cut risk, and the large trials didn't bear that out.

  • Niacin added to a statin didn't reduce cardiovascular events in AIM-HIGH (stopped early for lack of benefit) or HPS2-THRIVE (which also found more serious side effects)
  • The CETP inhibitor torcetrapib increased deaths and cardiac events in ILLUMINATE
  • The CETP inhibitor anacetrapib lowered events modestly in REVEAL, but it also lowered non-HDL cholesterol, the likelier reason

How do you improve your HDL?

Habits that improve metabolic health raise HDL modestly and improve what HDL reflects. Regular aerobic exercise, quitting smoking (which lowers HDL directly), and losing excess weight, particularly visceral fat, lead the list. Cutting refined carbohydrates and added sugar also lowers triglycerides.

Put your effort into lowering LDL-C and ApoB instead of chasing an HDL number. Trials have repeatedly shown that lowering them reduces heart attacks and strokes.

Trials in this guide

Each links to a plain summary with a quote from the PubMed abstract.

  • ILLUMINATE (2007) · Torcetrapib · 15,067 peopleHarm
  • AIM-HIGH (2011) · Extended-release niacin · 3,414 peopleNo significant benefit
  • HPS2-THRIVE (2014) · Niacin/laropiprant · 25,673 peopleNo significant benefit
  • REVEAL (2017) · Anacetrapib · 30,449 peopleBenefit

Common questions

▸What is a good level for your HDL cholesterol?

Above 40 mg/dL for men and above 50 mg/dL for women is the usual target, and 60 or higher has traditionally counted as protective. In two large Danish studies, extremely high HDL (roughly 97 mg/dL and up in men, 116 and up in women) linked to higher death rates.

▸What happens if your HDL is low?

Low HDL links to higher heart risk, but it usually travels with high triglycerides, insulin resistance, and excess weight. Use it as a signal to look at your whole metabolic picture.

▸How do you improve HDL?

Exercise, quitting smoking, and losing excess weight are the most reliable lifestyle ways, though the rise is usually modest. Niacin and CETP inhibitors didn't prevent heart attacks in large trials, so treatment focuses on LDL-C and ApoB.

▸Is HDL more important than LDL?

No. Trials show LDL and ApoB cause heart disease and that lowering them prevents heart attacks and strokes. HDL is a useful marker of metabolic health, and raising it with drugs hasn't shown the same benefit.

The full guideRead the complete, referenced version on Preval Health More detail, every study, and the date each figure was checked.

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Sources

Not medical advice. General education from published trials and drug labels, last updated October 2026. lipid.site is not a healthcare provider and cannot tell you what to take or change. Talk to your clinician before starting or stopping any treatment. If you have chest pain or other signs of a heart attack or stroke, call 911.