Lab results explained
Lipid Panel Explained: Reading Your Cholesterol Test Results
A lipid panel, often just called a cholesterol test, measures the fats in your blood that matter most for heart and blood vessel health. This page explains what is on the report, how to prepare and how clinicians read the numbers together. Each marker has its own detailed guide.
Tests in this panel
- LDL cholesterolThe main cholesterol that builds up in artery walls, and the usual treatment target.Read the guide
- HDL cholesterolCarries cholesterol away from the arteries. Low levels add to heart risk.Read the guide
- TriglyceridesFats from food and stored energy. Very sensitive to recent meals and alcohol.Read the guide
What is on a lipid panel?
A standard panel reports total cholesterol, LDL cholesterol, HDL cholesterol and triglycerides. Many reports also show non-HDL cholesterol (total cholesterol minus HDL), which counts all the cholesterol carried in particles that can build up in arteries. LDL is often calculated from the other values rather than measured directly.
Do you need to fast?
For most people a non-fasting test is fine for a routine check, and many guidelines now accept it. Triglycerides rise after a meal, so if they come back high, or your clinician needs a precise LDL, you may be asked to repeat the test after fasting for 8 to 12 hours. Water is fine.
How the numbers are read together
No single value tells the whole story. A high LDL matters more when HDL is low, triglycerides are high or other risk factors are present, such as smoking, high blood pressure, diabetes, older age or a family history of early heart disease. Clinicians often enter the panel into a risk calculator that estimates the chance of a heart attack or stroke over the next ten years.
What can change your results
Recent illness, pregnancy, some medicines (including steroids, some diuretics and hormone treatments), an underactive thyroid, poorly controlled diabetes, kidney disease and heavy drinking can all shift the numbers. A very high LDL from a young age can point to familial hypercholesterolemia, an inherited condition that is worth knowing about because it runs in families.
How often to test
Healthy adults are often checked every four to six years, and more often if results are borderline, other risk factors are present or treatment starts or changes. After starting a cholesterol-lowering medicine, a repeat test after one to three months shows how well it is working.
Frequently asked questions
What is a normal cholesterol level?
Many labs flag these as desirable for adults: total cholesterol below 200 mg/dL (5.2 mmol/L), LDL below 100 mg/dL (2.6 mmol/L), HDL of 40 mg/dL (1.0 mmol/L) or more in men and 50 mg/dL (1.3 mmol/L) or more in women, and triglycerides below 150 mg/dL (1.7 mmol/L). Your own LDL target depends on your overall risk, so it may be lower.
What is non-HDL cholesterol?
It is total cholesterol minus HDL. It captures LDL plus other particles that can build up in arteries, and it stays reliable when you have not fasted or your triglycerides are high. Many clinicians use it alongside LDL.
Can I lower my cholesterol without medicine?
Often by some amount. Eating less saturated fat and more fiber, vegetables and whole grains, staying active, keeping a healthy weight and limiting alcohol can improve LDL and triglycerides. Whether that is enough depends on your numbers and overall risk, which is a decision to make with your clinician.
Why does my report show mmol/L?
Labs outside the United States usually report lipids in mmol/L. To convert cholesterol from mg/dL, divide by 38.67; for triglycerides, divide by 88.57. Always compare against the reference range printed on your own report.
See your whole lipid panel in one place
Add your results to VHT to follow LDL, HDL and triglycerides over time, and ECHNA, your AI health assistant, explains what changed in plain language.
