Lipids · Blood test
LDL cholesterol test: normal range explained
Also printed as: LDL Cholesterol, LDL-C, LDL Direct, Low Density Lipoprotein
LDL cholesterol, or low-density lipoprotein cholesterol, is the cholesterol carried by LDL particles, the kind that can build up in artery walls. The adult range commonly printed is <100 mg/dL, the level MedlinePlus and the NHLBI call optimal, with 100 to 129 near optimal, but the range printed on your own report is the one that applies.
Last updated 4 sources
What is the normal range for LDL cholesterol?
| Printed for | Range |
|---|---|
| Adults | <100mg/dL |
Reference ranges vary between laboratories. Always use the range printed on your own report. Why ranges differ between labs
| Label | Range |
|---|---|
| Optimal | <100 mg/dL |
| Near optimal/above optimal | 100–129 mg/dL |
| Borderline high | 130–159 mg/dL |
| High | 160–189 mg/dL |
| Very high | ≥190 mg/dL |
These labels are the source's own, not Amara's. Your doctor reads your result with your history and other tests.
Sources:MedlinePlus, NHLBI
What does LDL cholesterol measure?
An LDL test measures the cholesterol carried in low-density lipoprotein particles. Lipoproteins are packages of fat and protein that move cholesterol through the blood; a high LDL level leads to cholesterol building up in the arteries, which is why MedlinePlus calls it the 'bad' cholesterol. Most labs calculate LDL from total cholesterol, HDL and triglycerides rather than measuring it directly.
Sources:MedlinePlus, Testing.com
Why do doctors order the LDL cholesterol test?
Doctors order LDL as part of a lipid profile to judge the risk of heart disease and stroke, and to follow treatment for high cholesterol. MedlinePlus suggests adults are tested every five years, men 45 to 65 and women 55 to 65 every one to two years, and more often with heart disease, diabetes or a family history. Treatment goals for LDL can differ from the printed range for someone with coronary artery disease or at high risk.
Sources:MedlinePlus, NHLBI
What can change your LDL cholesterol result?
LDL moves with diet, weight, age and medicines, and the calculation itself has limits.
- Saturated fat and cholesterol in food raise LDL, and extra weight tends to raise it too.
- LDL rises with age, and in women it tends to rise after the menopause.
- Some medicines, including steroids, some blood pressure medicines and some HIV medicines, can raise LDL. Tell your doctor what you take.
- Conditions such as chronic kidney disease, diabetes, an underactive thyroid and some liver diseases can raise LDL, which your doctor considers.
- Genes play a part: familial hypercholesterolaemia is an inherited form of very high LDL.
- When LDL is calculated, it becomes less reliable when triglycerides are high, so the lab may measure it directly instead.
Sources:MedlinePlus, Testing.com
How do you read LDL cholesterol on your lab report?
Reports print LDL in mg/dL and often mark it 'calculated' or 'direct'. MedlinePlus explains that a calculated LDL is an estimate from total cholesterol, HDL and triglycerides, while a direct LDL is measured from the sample; both are read the same way, against the range or legend beside them.
Many reports print the NCEP ATP III legend published by the NHLBI instead of a single range: optimal below 100, near optimal 100 to 129, borderline high 130 to 159, high 160 to 189 and very high 190 or above. MedlinePlus notes a doctor may set a different goal for someone with coronary artery disease, so the legend is a guide rather than a verdict.
Amara reads LDL cholesterol with the range printed beside it on each report, flags a value outside that range, and shows what changed since your last report. Try it with two sample reports
A sample Amara row for LDL: 118 mg/dL on 9 Feb 2026 at Lab A (sample), then 96 mg/dL on 1 Sep 2026 at Lab B (sample), each with its lab's printed range.
Sources:MedlinePlus, NHLBI
Questions people ask about LDL cholesterol
What is LDL on a lipid profile?
LDL on a lipid profile is low-density lipoprotein cholesterol, the cholesterol carried by LDL particles. MedlinePlus calls it the 'bad' cholesterol because a high level leads to a buildup of cholesterol in the arteries. On most reports it is calculated from total cholesterol, HDL and triglycerides, and Testing.com says some labs measure it directly when triglycerides are very high.
Why does my report print optimal, borderline and high for LDL?
The labels optimal, borderline and high are the NCEP ATP III categories published by the NHLBI: optimal below 100 mg/dL, near optimal 100 to 129, borderline high 130 to 159, high 160 to 189 and very high 190 or above. Labs print them as a legend to give one number context; your doctor reads yours with your risk.
Do I need to fast before an LDL test?
Fasting before an LDL test is often not required, Testing.com says: keep your usual diet unless your doctor asks for a fasting sample. MedlinePlus says a cholesterol test may need a 9 to 12 hour fast, so follow your lab's instructions and note on the report whether you fasted.
What is the difference between LDL and non-HDL cholesterol?
LDL is the cholesterol in low-density particles only, while non-HDL cholesterol is total cholesterol minus HDL, so it also counts VLDL and other particles. Testing.com explains that non-HDL captures all the cholesterol-carrying particles that can contribute to artery plaque, and MedlinePlus lists below 130 mg/dL as healthy for non-HDL in adults.
Sources:MedlinePlus, Testing.com, NHLBI
Sources
- LDL: The "Bad" CholesterolMedlinePlus · medlineplus.gov · Opened
- ATP III Guidelines At-A-Glance Quick Desk ReferenceNHLBI · nhlbi.nih.gov · Opened
- LDL Cholesterol Test (Lipid Panel): Check Your LevelsTesting.com · testing.com · Opened
- Cholesterol LevelsMedlinePlus · medlineplus.gov · Opened
About this page
Every statement on this page comes from the sources listed above. Ranges are those commonly printed on Indian lab reports; the range printed on your own report is the one that applies.
Published by Amara Health, a product of MetaNova AI Private Limited, Hyderabad.
Amara Health does not provide medical advice, diagnosis or treatment. Information shown by Amara is based on available health records and may contain errors. Review important information against the original report and consult a qualified healthcare professional for medical decisions. Do not use Amara for medical emergencies.
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