Cholesterol is checked with a simple blood test called a lipid panel. Most healthy adults should have one every 4 to 6 years, and the whole blood draw takes less than five minutes. You can get tested at a doctor’s office, a lab, a pharmacy clinic, or with an at-home kit, though accuracy varies significantly depending on the method.
What a Lipid Panel Measures
A standard lipid panel reports four numbers:
- Total cholesterol: the overall amount of cholesterol in your blood.
- LDL cholesterol: often called “bad” cholesterol because it builds up in artery walls.
- HDL cholesterol: “good” cholesterol that helps remove LDL from the bloodstream.
- Triglycerides: another type of fat in your blood that contributes to artery hardening when levels are too high.
Your results may also include a non-HDL cholesterol number, which is simply your total cholesterol minus your HDL. This gives a broader picture of all the harmful fats in your blood, not just LDL alone.
Where to Get Tested
The most common route is a standard blood draw at your doctor’s office or a lab. A healthcare professional draws a small sample from a vein in your arm, collects it in a vial, and sends it off for analysis. You may feel a brief sting, and the whole process typically takes under five minutes. Results usually come back within a day or two.
Many pharmacies and community health events also offer point-of-care cholesterol screenings using a finger prick. These give results in minutes and can be a convenient first look, but they measure fewer markers than a full lipid panel.
Do You Need to Fast?
Fasting before a cholesterol test used to be a universal rule, but guidelines have loosened. European medical organizations now say fasting is generally not required for routine lipid testing. A non-fasting test works fine for most people getting a standard screening.
That said, fasting still matters in certain situations. If your non-fasting triglycerides come back at 440 mg/dL or higher, a follow-up fasting test is recommended. Fasting is also advised if you have conditions linked to high triglycerides, or if your LDL result lands close to a treatment threshold where precision matters. Research shows that LDL levels measured after eating can fluctuate for up to 8 to 10 hours after a meal, so when accuracy is critical, fasting for at least 8 hours (water is fine) produces the most reliable numbers. If you’re monitoring LDL to see whether a cholesterol-lowering medication is working, a fasting draw gives a clearer before-and-after comparison.
At-Home Cholesterol Test Kits
Home cholesterol kits are widely available online and at pharmacies. They use a finger prick to collect a small blood sample, and some give results in minutes while others require mailing the sample to a lab. The convenience is appealing, but accuracy is a real concern.
A study evaluating five commercially available home cholesterol tests found dramatic differences in performance. The best-performing device had a margin of error of about 6% compared to a lab test, with 92% sensitivity and 89% specificity. That’s reasonably close to a professional result. But the worst performer was off by an average of 20%, which could easily push a normal reading into the “high” range or mask genuinely elevated cholesterol. Several of the tested devices failed to meet the accuracy qualifications needed for reliable results.
If you use a home kit, treat the result as a rough estimate. A reading that looks concerning, or one that seems surprisingly normal when you have risk factors, is worth following up with a lab-based lipid panel.
How Often to Get Tested
The CDC recommends most healthy adults get their cholesterol checked every 4 to 6 years. If you have heart disease, diabetes, or a family history of high cholesterol, you’ll need testing more frequently, often annually or as your doctor recommends based on treatment goals.
Children should be screened at least once between ages 9 and 11, then again between ages 17 and 21. Kids with obesity or diabetes may need earlier or more frequent screening.
Understanding Your Results
Once you have your numbers, here’s how they stack up. These targets apply to adults age 20 and older:
- Total cholesterol: less than 200 mg/dL is desirable.
- LDL cholesterol: less than 100 mg/dL is optimal.
- HDL cholesterol: 60 mg/dL or higher is ideal. For men, below 40 mg/dL is considered low. For women, below 50 mg/dL is low.
- Triglycerides: below 150 mg/dL is normal. Between 150 and 199 mg/dL is borderline high, and 200 mg/dL or above is high.
- Non-HDL cholesterol: less than 130 mg/dL.
For children and teens (age 19 or younger), the thresholds are different: total cholesterol should be under 170 mg/dL, LDL under 110 mg/dL, and HDL above 45 mg/dL.
Keep in mind that these are general targets. Your personal goals may be tighter or more relaxed depending on your overall cardiovascular risk. Someone who has already had a heart attack, for instance, will typically aim for a much lower LDL than someone with no risk factors.
Advanced Tests Beyond the Standard Panel
A basic lipid panel covers what most people need, but two additional markers can be valuable for certain individuals.
The first is apolipoprotein B (ApoB), a protein carried by LDL and other harmful particles. Because each dangerous particle carries exactly one ApoB molecule, measuring it tells you the actual number of harmful particles in your blood, not just the total amount of cholesterol inside them. Guidelines from the American College of Cardiology and American Heart Association recommend ApoB testing when triglycerides are high, since elevated triglycerides can make standard LDL calculations less accurate. It’s also useful for gauging whether cholesterol-lowering treatment is working well enough.
The second is lipoprotein(a), often written as Lp(a). This is a genetically determined particle that raises cardiovascular risk independently of LDL. Testing is recommended if you have a family history of premature heart disease, if you have heart disease that isn’t fully explained by your standard risk factors, or if a close relative has known elevated Lp(a). Unlike LDL, Lp(a) levels are largely set by your genetics and don’t change much with diet or lifestyle, so a single measurement at some point in your life is typically enough to know where you stand.