A good total cholesterol level for adults is below 200 mg/dL, with LDL (“bad”) cholesterol under 100 mg/dL, HDL (“good”) cholesterol at 40 mg/dL or higher for men and 50 mg/dL or higher for women, and triglycerides below 150 mg/dL. But those headline numbers only tell part of the story. Your cholesterol results are a panel of several values, and each one plays a different role in your heart disease risk.
Total Cholesterol: The Big Picture Number
Total cholesterol is the first number most people see on their lab results. It combines your LDL, HDL, and a portion of your triglycerides into a single figure. For adults, the breakdown looks like this:
- Normal: Less than 200 mg/dL
- Borderline high: 200 to 239 mg/dL
- High: 240 mg/dL or above
Total cholesterol is a useful screening tool, but it can be misleading on its own. Someone with a total of 210 might have a very high HDL level pulling that number up, which is actually protective. That’s why doctors look at the individual components rather than making decisions based on total cholesterol alone.
LDL Cholesterol: The Number That Matters Most
LDL cholesterol is the type that builds up in artery walls and forms plaques that can eventually block blood flow. For most adults, a healthy LDL is below 100 mg/dL. The lower your LDL, the lower your risk of heart attack and stroke.
If you already have heart disease or have had a cardiovascular event like a heart attack or stroke, the targets get much stricter. The 2026 guidelines from the American College of Cardiology and American Heart Association recommend getting LDL below 70 mg/dL for people with existing heart disease. For those at very high risk, meaning they’ve had multiple cardiovascular events or have several additional risk factors, the goal drops even further to below 55 mg/dL.
These lower targets usually require medication to reach, but for the general population without heart disease, lifestyle changes like diet, exercise, and weight management can often keep LDL in a healthy range.
HDL Cholesterol: Higher Is Better
HDL works in the opposite direction from LDL. It helps remove excess cholesterol from your bloodstream and carries it back to the liver for disposal. Unlike other cholesterol numbers where lower is the goal, you want HDL to be as high as possible.
The minimum healthy levels differ by sex. Men should aim for at least 40 mg/dL, while women should target at least 50 mg/dL. Falling below these thresholds increases heart disease risk, especially when combined with high triglycerides or high LDL. Regular aerobic exercise, not smoking, and maintaining a healthy weight are the most effective ways to raise HDL.
Triglycerides: The Fat in Your Blood
Triglycerides aren’t technically cholesterol, but they show up on the same blood test and play a significant role in cardiovascular risk. Your body converts calories it doesn’t need right away into triglycerides and stores them in fat cells. Consistently high levels signal that your body is processing more energy than it can use.
- Healthy: Below 150 mg/dL
- Borderline high: 150 to 199 mg/dL
- High: 200 to 499 mg/dL
- Very high: 500 mg/dL or above
High triglycerides combined with either low HDL or high LDL is a particularly risky combination for heart attack and stroke. Refined carbohydrates, sugar, and alcohol tend to drive triglycerides up more than dietary fat does, so cutting back on those often brings levels down quickly.
Non-HDL Cholesterol: A More Complete Picture
Many physicians now consider non-HDL cholesterol a better predictor of heart disease risk than LDL alone. The calculation is simple: subtract your HDL from your total cholesterol. The result captures all the harmful types of cholesterol in your blood, not just LDL.
Your non-HDL target should be no more than 30 mg/dL higher than your LDL goal. For most adults with an LDL target of under 100, that means non-HDL should stay below 130 mg/dL. If you have heart disease and are aiming for an LDL under 70, your non-HDL goal drops to below 100.
You can also calculate your cholesterol ratio by dividing total cholesterol by HDL. If your total is 200 and your HDL is 50, your ratio is 4 to 1. A lower ratio means lower risk. However, non-HDL cholesterol has largely replaced this ratio in clinical practice because it provides more actionable information.
Cholesterol Numbers for Children and Teens
Healthy cholesterol levels are lower for anyone 19 or younger. The targets for children and adolescents are:
- Total cholesterol: Less than 170 mg/dL
- LDL: Less than 110 mg/dL
- HDL: More than 45 mg/dL
- Non-HDL: Less than 120 mg/dL
- Triglycerides: Less than 90 mg/dL
The American Academy of Pediatrics recommends universal cholesterol screening between ages 9 and 11, then again between 17 and 21. Children with a family history of early heart disease or high cholesterol may need testing sooner.
Do You Need to Fast Before the Test?
Traditionally, you were told to fast for 9 to 12 hours before a cholesterol test. That’s shifting. Many experts and European guidelines now support non-fasting blood draws for routine screening because the practical advantages, like not needing a separate morning appointment, outweigh the small differences in results.
The main value affected by eating is triglycerides, which run about 15 mg/dL higher in non-fasting samples. Total cholesterol, LDL, and HDL stay nearly identical whether you’ve eaten or not. If your non-fasting triglycerides come back elevated, your doctor may ask you to repeat the test after fasting for a more precise measurement. For most routine screenings, though, fasting isn’t strictly necessary.
Lipoprotein(a): A Lesser-Known Risk Factor
Standard cholesterol panels don’t measure lipoprotein(a), often written as Lp(a). This is a genetically determined type of LDL particle that increases the risk of heart disease and stroke independently of your regular LDL level. Levels above 50 mg/dL (or 125 nmol/L) are considered high, and roughly one in five people falls into this category.
Unlike other cholesterol numbers, Lp(a) is largely set by your genes and doesn’t change much with diet or exercise. Knowing your level can be useful because it might change how aggressively you and your doctor manage other risk factors. You only need to test it once in your lifetime since the result stays relatively stable. If you have a family history of early heart disease that isn’t explained by standard risk factors, asking for an Lp(a) test is worth considering.