An HDL cholesterol level of 60 mg/dL or higher is considered optimal for both men and women. Below 40 mg/dL in men or below 50 mg/dL in women is considered low and signals increased cardiovascular risk. But the full picture of what makes HDL “good” is more nuanced than a single number suggests.
Optimal HDL Levels by Sex
For adults age 20 and older, the general targets are straightforward:
- Men: 60 mg/dL or above is best. Below 40 mg/dL is low.
- Women: 60 mg/dL or above is best. Below 50 mg/dL is low.
- Children and adolescents: Above 45 mg/dL is acceptable. Between 40 and 45 is borderline, and below 40 is abnormal.
The gap between men and women matters. Estrogen tends to raise HDL levels, which is one reason the low threshold for women is set 10 points higher. A woman at 45 mg/dL and a man at 35 mg/dL are both in concerning territory, even though their numbers are quite different.
Why HDL Quality Matters More Than the Number
HDL is often called “good cholesterol” because of a specific job it performs: picking up excess cholesterol from your blood vessels and ferrying it back to the liver, where it gets recycled or eliminated through bile. This cleanup process, known as reverse cholesterol transport, is the main reason higher HDL has long been linked to lower heart disease risk.
But cardiologists have started paying closer attention to how well your HDL particles actually do that job, not just how many of them you have. A large study from the PREVEND cohort found that people who went on to develop cardiovascular disease had HDL that was about 9% less effective at removing cholesterol from cells, even though their HDL levels on a standard blood test were virtually identical to those who stayed healthy. In other words, two people with the same HDL number on paper can have meaningfully different levels of protection.
This was true even among people with high HDL concentrations. HDL can be dysfunctional at any level, particularly when inflammation is present. The study found that people with high HDL but poor HDL function also tended to have elevated markers of inflammation. This is one reason the current 2026 cholesterol management guidelines from the American Heart Association and American College of Cardiology do not set a specific HDL treatment target. The focus for medication therapy is on lowering LDL cholesterol, not raising HDL.
Your Cholesterol Ratio May Be More Useful
Rather than looking at HDL in isolation, many doctors find your total-cholesterol-to-HDL ratio more informative. You calculate it by dividing your total cholesterol by your HDL number. If your total cholesterol is 200 and your HDL is 50, your ratio is 4:1.
Most doctors want this ratio below 5:1. A ratio below 3.5:1 is considered very good. This ratio captures the balance between the cholesterol clogging your arteries and the cholesterol being cleared away, which gives a better snapshot of risk than either number alone. If your HDL is 55 (technically below the “optimal” 60 threshold) but your total cholesterol is 180, your ratio of 3.3:1 is excellent.
How Much Can Exercise Raise HDL?
Exercise is the most commonly recommended lifestyle change for improving HDL, but the actual numbers are humbling. In one of the largest exercise training studies (the HERITAGE cohort, with nearly 700 participants), men increased their HDL by an average of just 1.1 mg/dL and women by 1.4 mg/dL. That’s a real, statistically significant change, but it’s not going to move someone from 35 to 60.
People who start with normal HDL levels tend to see a slightly better bump. One controlled study found a 12% increase (about 5 mg/dL) in people who already had normal HDL, compared to only a 6% increase (about 2 mg/dL) in those with low HDL. The people who need the boost most get the least from exercise alone. Exercise does, however, lower triglycerides effectively in people with high triglyceride levels, which indirectly improves your overall lipid profile.
This doesn’t mean exercise isn’t worth it for heart health. It reduces cardiovascular risk through dozens of mechanisms beyond just HDL. But if your doctor flags low HDL, exercise alone is unlikely to fix the number.
Other Factors That Influence HDL
Smoking is one of the most reliable HDL suppressors. Quitting typically raises HDL by several points within weeks. Carrying excess weight, particularly around the midsection, also drags HDL down, and weight loss tends to raise it more meaningfully than exercise at a stable weight. Moderate alcohol consumption raises HDL, though the cardiovascular tradeoffs of drinking make this a poor strategy for most people.
Diets high in trans fats lower HDL, while replacing refined carbohydrates with unsaturated fats (olive oil, nuts, fatty fish) can modestly improve it. Very low-fat diets sometimes lower HDL alongside LDL, which is worth knowing if you’re restricting dietary fat aggressively.
Some people have genetically low HDL that doesn’t respond much to lifestyle changes. In these cases, the overall risk picture, including LDL levels, blood pressure, family history, and inflammation markers, matters far more than chasing a specific HDL target. Low HDL is one piece of a larger metabolic pattern often seen alongside high triglycerides, insulin resistance, and abdominal obesity. Addressing those conditions tends to improve HDL as a side effect, even when the HDL itself proves stubborn to move directly.