A good HDL cholesterol level is at least 40 mg/dL for men and at least 50 mg/dL for women, according to the CDC. But the story of HDL is more nuanced than a single number. Higher isn’t always better, the quality of your HDL particles matters as much as the quantity, and the latest clinical guidelines don’t even set an upper treatment target for HDL the way they do for LDL.
What HDL Actually Does in Your Body
HDL is often called “good” cholesterol because it works as a cleanup crew in your bloodstream. Through a process called reverse cholesterol transport, HDL particles pick up excess cholesterol from your blood vessels and tissues, including the walls of your arteries, and carry it back to the liver. From there, the liver either recycles the cholesterol for other uses or routes it to the gallbladder for removal from the body.
This matters because cholesterol that builds up inside artery walls is what forms plaque, the foundation of heart disease. HDL essentially pulls cholesterol out of those danger zones before it can do lasting damage. The process starts when your liver and intestines produce a protein that enters the bloodstream and travels to tissues like the heart, where it latches onto cells and draws cholesterol out of them. That cholesterol-loaded particle is what becomes a mature HDL particle on its way back to the liver.
The Numbers That Matter
The minimum thresholds are 40 mg/dL for men and 50 mg/dL for women. Below these levels, your risk of heart disease increases meaningfully. Levels of 60 mg/dL and above have traditionally been considered protective.
Your doctor may also look at the ratio of your total cholesterol to your HDL cholesterol. You get this by dividing your total cholesterol by your HDL number. A lower ratio signals lower risk. That said, many clinicians now prefer to focus on non-HDL cholesterol (your total cholesterol minus your HDL) as a more useful predictor of heart disease risk. The most recent 2026 guidelines from the American Heart Association and American College of Cardiology set treatment goals for LDL and non-HDL cholesterol but notably do not define a specific HDL target to aim for.
When HDL Gets Too High
For decades, the assumption was that higher HDL is always better. Recent research tells a different story. The relationship between HDL and death from any cause follows a U-shaped curve, particularly in men. Very low levels are dangerous, but extremely high levels carry their own risks.
In a large Korean cohort study, men with HDL above 80 mg/dL had a 31% higher risk of death from all causes compared to men with levels in the normal range, even after adjusting for other health factors. A separate study using data from the UK general population and Emory Healthcare sites in Atlanta found that people with existing coronary artery disease and HDL above 80 mg/dL had a 96% higher risk of death from all causes and a 71% higher risk of cardiovascular death compared to those with HDL between 40 and 60 mg/dL.
The leading explanation is that at extremely high concentrations, HDL particles may undergo structural and functional changes that strip away their protective effects. Instead of efficiently removing cholesterol from arteries, these altered particles may become dysfunctional or even pro-inflammatory.
Quality Matters More Than Quantity
A standard blood test tells you how much HDL cholesterol is floating around in your blood, but it doesn’t tell you how well those particles are actually working. Researchers now distinguish between HDL quantity (the number on your lab report) and HDL function (how effectively your particles pull cholesterol out of cells).
One key metric is cholesterol efflux capacity, which measures how well your HDL extracts cholesterol from immune cells embedded in artery walls. This is considered the rate-limiting step of the whole cleanup process. In a large analysis from the JUPITER trial, HDL particle number was a stronger predictor of cardiovascular events than either HDL cholesterol levels or efflux capacity alone. People with more HDL particles had significantly fewer heart attacks and strokes, with each standard-deviation increase in particle number cutting risk by about 31% at baseline and 49% during statin therapy.
This is part of why simply chasing a higher HDL number on a blood test hasn’t panned out as a treatment strategy. The static measurement of HDL cholesterol may not capture what those particles are actually doing. Two people with the same HDL level can have very different levels of cardiovascular protection depending on how functional their particles are.
How to Raise HDL Naturally
Exercise is the most reliable way to boost HDL. As little as 60 minutes of moderate-intensity aerobic exercise per week can raise HDL levels while also lowering triglycerides. Walking briskly, cycling, swimming, or jogging all count. More exercise generally produces larger gains, but even modest amounts make a measurable difference.
Diet plays a significant role too. The Mediterranean dietary pattern, rich in olive oil, nuts, fruits, vegetables, whole grains, and moderate amounts of wine, has consistently been linked to higher HDL levels. The polyphenols found in extra-virgin olive oil, nuts, and fruits appear to increase HDL while also providing antioxidant and anti-inflammatory benefits that support the particles’ function, not just their number. Replacing refined carbohydrates and processed foods with these whole-food sources of healthy fats is one of the most practical dietary shifts you can make.
Smoking lowers HDL, and quitting reverses that effect over time. Losing excess weight, particularly abdominal fat, also tends to raise HDL. These lifestyle changes work together: someone who starts exercising, improves their diet, and quits smoking may see HDL increases that no single intervention would produce alone.
What Medications Can and Can’t Do
Statins, the most commonly prescribed cholesterol drugs, are designed primarily to lower LDL. They do modestly increase HDL as a side effect. In one study, a year of statin therapy raised HDL cholesterol by about 7.7% and HDL particle number by 5.2%. But no medication has proven that raising HDL specifically reduces heart disease events.
Niacin (vitamin B3) is the most potent HDL-raising drug available and has been used in combination with statins. However, clinical trials testing whether adding niacin to statin therapy reduces heart attacks and strokes have been largely disappointing. This is consistent with the broader finding that HDL function matters more than HDL levels. Pushing the number up artificially doesn’t necessarily create more functional particles.
Current guidelines reflect this reality. Treatment decisions focus on lowering LDL and non-HDL cholesterol rather than raising HDL to a specific target. If your HDL is low, it’s treated as a risk marker that signals a need for lifestyle changes and closer attention to your other cholesterol numbers, not as something to medicate directly in most cases.