TempoLife › Features › Blood test reference ranges › ldl-cholesterol
LDL cholesterol
The cholesterol carried by low-density lipoprotein particles. LDL particles deliver cholesterol to tissues, and when there are many of them, cholesterol accumulates in artery walls. LDL-C is usually calculated from the other measured lipids rather than measured directly, which is why a very high triglyceride level makes it unreliable.
General information only — not a diagnosis, not treatment and not a substitute for your doctor. Reference ranges differ between laboratories, so the range printed on your own report is the one that counts, and only a clinician who knows your history can say what a result means for you. Never start, stop or change a medicine or supplement based on this page.
Usual adult reference range
The ranges below are typical adult reference intervals. Your own laboratory sets its own, printed next to your result, and that is the one to compare against.
| Group | SI units (mmol/L) | Conventional (mg/dL) |
|---|---|---|
| General-population desirable level | below 3.0 | below 115 |
| Lower targets are used at higher cardiovascular risk | set individually | set individually |
Source: Commonly quoted desirable levels from cardiovascular prevention guidance; individual targets are set by a clinician on the basis of total risk. · checked 2026-09-02
What a high result generally indicates
Higher LDL over years means more cholesterol deposited in artery walls. Whether a particular level warrants action depends entirely on the rest of the risk picture: the same LDL means something different at 30 with no other risk factors than at 65 after a heart attack. That judgement is a clinical one.
What a low result generally indicates
Low LDL is generally regarded as favourable and is the intended effect of lipid-lowering treatment. Very low values without treatment can accompany hyperthyroidism, liver disease or malabsorption.
These are general patterns, not a diagnosis. Many things cause a high or low result, and the same figure means different things in different people. What yours means is a question for the doctor who ordered the test.
What affects this result
- Saturated and trans fat intake raise it; unsaturated fats and soluble fibre lower it.
- Genetics set the baseline; familial hypercholesterolaemia raises it from birth.
- Weight loss and physical activity lower it modestly.
- Untreated hypothyroidism raises it.
- When triglycerides are very high, the calculated LDL is unreliable and non-HDL cholesterol is used instead.
- Statins and other lipid-lowering medicines are designed to lower it.
Before the test
Usually non-fasting. If triglycerides are markedly raised the laboratory may ask for a fasting repeat.
Any preparation instruction that comes with your test slip overrides this general note — follow the one your clinician or laboratory gave you.
The one thing to take from this page
The range above is a typical interval for orientation. Your own laboratory's range, printed beside your result, is the one that applies to you — and a result is only meaningful alongside your symptoms, your history, your medicines and your other tests. That reading is a clinician's job. This page cannot diagnose anything, cannot tell you to change a medicine or a supplement, and is not a substitute for the person who ordered your test.
Frequently asked questions
What is the normal range for ldl cholesterol?
A typical adult reference interval is below 3 mmol/L, but laboratories differ — the range printed on your own report is the one to use. And a result inside or outside a range is only meaningful in context, which is your doctor's reading, not a web page's.
What does a high ldl cholesterol mean?
Higher LDL over years means more cholesterol deposited in artery walls. Whether a particular level warrants action depends entirely on the rest of the risk picture: the same LDL means something different at 30 with no other risk factors than at 65 after a heart attack. That judgement is a clinical one.
What does a low ldl cholesterol mean?
Low LDL is generally regarded as favourable and is the intended effect of lipid-lowering treatment. Very low values without treatment can accompany hyperthyroidism, liver disease or malabsorption.
Other markers
Haemoglobin
Hb, HGB
Ferritin
Serum ferritin
Vitamin D (25-OH)
25-hydroxyvitamin D, calcidiol
HbA1c
Glycated haemoglobin, A1c
Fasting glucose
Fasting plasma glucose, FPG
Total cholesterol
TC
All markers and the checker · Symptoms and nutrients · Medicine interactions
Bring context to your next result
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