Lab results explained
HDL Cholesterol Explained: What Your “Good” Cholesterol Number Means
HDL is often called “good” cholesterol because it carries cholesterol away from your arteries to the liver. A low HDL is linked to a higher risk of heart disease, but HDL is only one part of the picture. This guide explains the ranges, what affects HDL, and how it fits with LDL and triglycerides.
Part of Lipid panel (cholesterol test)
Typical ranges at a glance
- Low (higher heart risk), men
- Below 40 mg/dL (below 1.0 mmol/L)
- Low (higher heart risk), women
- Below 50 mg/dL (below 1.3 mmol/L)
- Usual range
- 40 to 60 mg/dL for men, 50 to 60 mg/dL for women (1.0 to 1.5 mmol/L)
- Higher
- 60 mg/dL or more (1.5 mmol/L or more); very high levels are not always more protective
HDL is usually reported as part of a lipid panel, in mg/dL or mmol/L. Cut-offs differ a little between countries and labs. Always use the reference range printed on your own report.
What does HDL do?
Cholesterol travels in the blood inside particles called lipoproteins. HDL (high-density lipoprotein) picks up extra cholesterol from the body, including from artery walls, and brings it back to the liver to be cleared. That is why higher HDL has long been linked to a lower risk of heart attack and stroke, and low HDL to a higher risk.
What causes low HDL?
Common reasons include the genes you inherit, little physical activity, excess weight around the waist, insulin resistance or type 2 diabetes, high triglycerides and smoking. Some medicines, such as anabolic steroids, some progestins and certain blood pressure drugs, can lower HDL too. Low HDL often travels with high triglycerides as part of metabolic syndrome.
Is higher HDL always better?
Not always. Up to about 60 mg/dL (1.5 mmol/L), higher HDL goes with lower risk. Above about 80 to 100 mg/dL (2.0 to 2.5 mmol/L), studies show the benefit levels off, and very high HDL is sometimes linked to higher risk, often because of genes or other conditions. Medicines that raise HDL have not been shown to prevent heart attacks, so HDL on its own is not a treatment target.
How HDL fits with the rest of your lipid panel
Clinicians look at HDL together with LDL, triglycerides and total cholesterol. Non-HDL cholesterol (total cholesterol minus HDL) counts all the cholesterol that can build up in arteries and is often a better guide than HDL alone. The ratio of total cholesterol to HDL is also used; a lower ratio is better. Heart risk calculators combine these with age, blood pressure, smoking and diabetes.
Does HDL change from day to day?
Less than triglycerides, but it does vary. A recent illness, a big change in weight or diet, and some medicines can shift it. You usually do not need to fast for HDL, although your clinician may ask you to fast if triglycerides are measured at the same time. One result is best read together with earlier ones.
What can raise HDL?
Regular aerobic exercise, losing weight if you carry extra, stopping smoking, and swapping refined carbohydrates and trans fats for whole foods and unsaturated fats can raise HDL a little. These changes also lower LDL and triglycerides, which matters more for your heart. Alcohol can raise HDL, but drinking is not recommended as a way to do so.
Frequently asked questions
What is a good HDL level?
For most adults, 40 mg/dL (1.0 mmol/L) or more for men and 50 mg/dL (1.3 mmol/L) or more for women is in the usual range, and around 60 mg/dL (1.5 mmol/L) is often considered good. Your clinician reads it alongside LDL, triglycerides and your other risk factors.
Is low HDL dangerous?
Low HDL is a risk factor for heart disease, not a disease in itself. It matters most when other risks are present, such as high LDL, high blood pressure, diabetes or smoking. Your clinician uses it as part of your overall heart risk.
Can HDL be too high?
Very high HDL, roughly above 80 to 100 mg/dL (2.0 to 2.5 mmol/L), does not seem to give extra protection and can sometimes come with other conditions. It is not usually a cause for concern on its own, but it is worth mentioning to your clinician.
Is there a medicine to raise HDL?
Some medicines raise HDL, but trials have not shown that raising HDL with drugs prevents heart attacks. Treatment usually focuses on lowering LDL and your overall risk instead.
See your HDL next to the rest of your health
Add your results to VHT and see HDL alongside your LDL, triglycerides, activity and history, and ECHNA, your AI health assistant, explains what changed in plain language.
