TempoLife › Features › Blood test reference ranges › hdl-cholesterol
HDL cholesterol
The cholesterol carried by high-density lipoprotein particles, which move cholesterol away from tissues and back to the liver. HDL-C is inversely associated with cardiovascular risk in population data — higher is generally better — but raising it with medicines has not produced the benefit that association suggested, so it is used as a risk marker rather than a treatment target.
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) |
|---|---|---|
| Men, commonly quoted lower bound | above 1.0 | above 40 |
| Women, commonly quoted lower bound | above 1.2 | above 45 |
Source: Commonly quoted lower bounds from cardiovascular prevention guidance; these are risk markers rather than treatment targets. · checked 2026-09-02
What a high result generally indicates
A high HDL has traditionally been read as favourable. Very high values are sometimes genetic and, in some studies, the association with lower risk does not continue at the extreme, so it is not a number to chase upwards.
What a low result generally indicates
Low HDL often travels with high triglycerides, central weight gain, physical inactivity and insulin resistance, and it is part of the pattern clinicians look at as a whole rather than a problem to be corrected in isolation.
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
- Regular aerobic exercise raises it; inactivity lowers it.
- Smoking lowers it; stopping raises it again.
- Alcohol raises it, which is not a reason to drink more.
- Type 2 diabetes and central obesity are associated with lower values.
- Some medicines, including anabolic steroids, lower it markedly.
- Genetics account for a large share of the between-person difference.
Before the test
No fasting needed.
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 hdl cholesterol?
A typical adult reference interval is 1 mmol/L or above, 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 hdl cholesterol mean?
A high HDL has traditionally been read as favourable. Very high values are sometimes genetic and, in some studies, the association with lower risk does not continue at the extreme, so it is not a number to chase upwards.
What does a low hdl cholesterol mean?
Low HDL often travels with high triglycerides, central weight gain, physical inactivity and insulin resistance, and it is part of the pattern clinicians look at as a whole rather than a problem to be corrected in isolation.
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
TempoLife tracks the weight, sleep and activity trends a single blood test cannot see, so you and your doctor have the fuller picture.