HDL Cholesterol
HDL cholesterol (HDL-C) measures the cholesterol carried by high-density lipoprotein particles. HDL plays a protective role in cardiovascular health through reverse cholesterol transport — the process of moving cholesterol from arterial walls back to the liver for excretion.
Higher HDL-C levels are generally associated with lower cardiovascular risk. However, extremely high HDL-C (>90 mg/dL) does not necessarily provide additional protection and may even be associated with increased risk in some studies, possibly due to dysfunctional HDL particles.
HDL-C is influenced by genetics, exercise (especially aerobic), moderate alcohol consumption, and body composition. Low HDL-C is commonly seen alongside high triglycerides, insulin resistance, and metabolic syndrome — a pattern known as atherogenic dyslipidemia.
What It Measures
HDL-C measures the amount of cholesterol carried by HDL particles. It serves as a marker for the reverse cholesterol transport pathway and is inversely associated with cardiovascular risk.
Reference Ranges
| Status | Range (mg/dL) |
|---|---|
| Optimal | > 60 mg/dL |
| Normal | 40–60 mg/dL (men), 50–60 mg/dL (women) |
| Borderline | 35–40 mg/dL |
| Out of Range | < 35 mg/dL |
Optimal Ranges
| Group | Range | Unit | Source |
|---|---|---|---|
| Men | 40–100 | mg/dL | Standard reference |
| Women | 50–100 | mg/dL | Standard reference |
| Optimal | 60–90 | mg/dL | Functional range |
When Values Are High
Very high HDL (>100 mg/dL) may paradoxically increase cardiovascular risk due to dysfunctional HDL particles. Recent research suggests HDL functionality matters more than absolute levels.
When Values Are Low
Low HDL is an independent cardiovascular risk factor. Associated with insulin resistance, metabolic syndrome, physical inactivity, and smoking.
What To Do
Lifestyle
- •Aerobic exercise is the most effective HDL raiser
- •Moderate alcohol consumption raises HDL (but risks outweigh benefits for non-drinkers)
- •Quit smoking — smoking directly suppresses HDL
- •Lose visceral fat — obesity lowers HDL
Supplements
- •Niacin (vitamin B3) raises HDL but no longer recommended due to side effects
- •Omega-3 fatty acids modestly improve HDL
- •Olive oil (EVOO) improves HDL functionality
When to Retest
Retest 8–12 weeks after lifestyle changes
How GATOR Tracks This
Lab Providers
Related Clinical Ratios
Related Biomarkers
This content is for informational purposes only and does not constitute medical advice. Reference ranges may vary by laboratory and individual factors. Consult a qualified healthcare provider for interpretation of your results and treatment decisions.
Track HDL Cholesterol in GATOR
Import your lab results and see how this biomarker trends over time with AI-powered context.
Get Started Free