A lipid panel measures four types of fats in your blood: total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides. Together, these numbers give a snapshot of your cardiovascular health and help estimate your risk of heart attack or stroke. Some reports also include calculated values like non-HDL cholesterol and VLDL cholesterol, which are derived from those core four measurements.
The Four Core Measurements
Every standard lipid panel reports the same four numbers, each measured in milligrams per deciliter (mg/dL).
Total cholesterol is the sum of all cholesterol circulating in your blood. For adults 20 and older, a healthy level is below 200 mg/dL. This number gives a broad overview but doesn’t tell you much on its own, because it combines both harmful and protective types of cholesterol.
LDL cholesterol is often called “bad” cholesterol. LDL particles carry cholesterol into artery walls, where they get trapped, trigger inflammation, and gradually build into fatty plaques. Over time, immune cells swarm these deposits and die, creating a soft, unstable core inside the plaque that can rupture and cause a heart attack or stroke. An elevated LDL concentration alone is enough to drive this process. A healthy LDL is below 100 mg/dL for most adults.
HDL cholesterol works in the opposite direction. HDL particles pull cholesterol out of artery walls and carry it back to the liver, where it’s eventually eliminated through the digestive tract. This cleanup process is the primary reason HDL is considered “good” cholesterol. For men, levels below 40 mg/dL are considered low; for women, the cutoff is below 50 mg/dL. Levels at or above 60 mg/dL are ideal for both.
Triglycerides are the most common type of fat in your blood, and they come largely from calories your body doesn’t need right away. Normal triglycerides are below 150 mg/dL, borderline high is 150 to 199, and anything at 200 or above is considered high. Beyond heart disease risk, very high triglycerides (above 500 mg/dL) progressively raise the risk of acute pancreatitis, a painful and potentially dangerous inflammation of the pancreas. At levels above 1,000 mg/dL, that risk reaches roughly 5 percent, and it climbs to 10 to 20 percent above 2,000 mg/dL.
Non-HDL Cholesterol and Other Calculated Values
Your results may include non-HDL cholesterol, which is simply your total cholesterol minus your HDL. This number captures all the cholesterol types that contribute to plaque buildup, not just LDL. For adults, a healthy non-HDL level is below 130 mg/dL. Some clinicians consider it a more reliable marker than LDL alone, especially when triglycerides are elevated.
LDL itself is usually calculated rather than directly measured. The standard formula subtracts your HDL and one-fifth of your triglycerides from your total cholesterol. This calculation works well for most people, but it becomes unreliable when triglycerides exceed 400 mg/dL or when LDL is very low (below 70 mg/dL). In those cases, your lab may use a direct measurement method instead.
How Your Results Are Used
A lipid panel isn’t interpreted in isolation. Your cholesterol numbers feed into a broader cardiovascular risk calculation that also factors in your age, sex, race, blood pressure, diabetes status, and whether you smoke. The result is a 10-year risk estimate, expressed as a percentage chance of having a heart attack or stroke. For context, the “optimal” profile used as a baseline in these calculators assumes total cholesterol at or below 170 mg/dL and HDL at or above 50 mg/dL, combined with normal blood pressure and no smoking or diabetes.
LDL gets special attention in treatment decisions. Even though it’s not part of the main risk equation (which uses total and HDL cholesterol), a persistently elevated LDL is the direct target of cholesterol-lowering therapy. If your LDL stays high, that number will likely drive the conversation about whether lifestyle changes alone are sufficient or whether medication makes sense.
Healthy Ranges at a Glance
Targets vary slightly by age and sex:
- Total cholesterol: Below 200 mg/dL for adults, below 170 for anyone 19 or younger
- LDL: Below 100 mg/dL for adults, below 110 for children and teens
- HDL: 60 mg/dL or higher is ideal; below 40 (men) or 50 (women) is considered low
- Triglycerides: Below 150 mg/dL
- Non-HDL: Below 130 mg/dL for adults, below 120 for those 19 and younger
Do You Need to Fast Before the Test?
For most people, no. Current guidelines from the European Atherosclerosis Society recommend non-fasting blood draws as the routine approach for lipid testing. A non-fasting panel is appropriate for initial screening, cardiovascular risk assessment, children, elderly patients, people with diabetes (who risk low blood sugar from skipping meals), and anyone already on stable cholesterol medication.
Fasting may still be necessary in specific situations: if your non-fasting triglycerides come back above 440 mg/dL, if you’re being monitored for known high triglycerides, or if you’re recovering from pancreatitis caused by high triglycerides. Your provider will tell you if a fasting draw is needed. When fasting is required, it typically means no food or drink other than water for 9 to 12 hours beforehand.
How Often to Get Tested
The CDC recommends that most healthy adults have a lipid panel every 4 to 6 years. Children should be screened at least once between ages 9 and 11, and again between ages 17 and 21. If you have heart disease, diabetes, a family history of high cholesterol, or obesity, you’ll likely need testing more frequently. The same applies to children with obesity or diabetes, who may need earlier and more regular screening.