Heart and cholesterol markers
HDL Levels by Age: What Is a Normal HDL Cholesterol?
Reviewed by a qualified clinician · analysed at UKAS-accredited UK labs (ISO 15189)
Last reviewed September 20268 min read
Every Helvy guide is written by our health editors, then checked by a qualified clinician before it goes live and re-checked as the science moves. We name clinical roles, not individuals, until each reviewer has agreed to be credited publicly. This is wellness guidance to help you understand your own data, not a diagnosis.
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HDL is the cholesterol number the UK splits by sex, not by age. The British Heart Foundation calls above 1.0 mmol/L healthy for men and above 1.2 mmol/L healthy for women. Those figures hold at 25 and at 75. Across half a million UK adults, women averaged 0.31 mmol/L higher than men.
Not sure which markers you need? Build your test →Your result says HDL 1.1. You are a woman of 54, and the healthy line you keep reading is 1.2. So you go looking for a chart that tells you what 1.1 means at 54, and every chart you find is about total cholesterol instead.
There is a reason for that. HDL does not work the way the other cholesterol numbers do, and age is the wrong question to ask of it. This guide gives you the UK figures, then the part the charts skip.
1. What is a normal HDL level in the UK?
Above 1.0 mmol/L for men. Above 1.2 mmol/L for women. HDL stands for high-density lipoprotein, which is the particle that carries cholesterol back out of your blood towards your liver. More of it is generally taken as a good sign.
The British Heart Foundation puts the two figures side by side and does not add an age column:
“Above 1.0mmol/L is a healthy level for men and above 1.2mmol/L is a healthy level for women.”
— British Heart Foundation
Note what is missing. No decades, no bands, no separate line for 60. One figure per sex, for every adult.
What does an HDL of 0.9, 1.3 or 2.0 mean?
Most people arrive holding one figure. Here it is, one value at a time, in mmol/L.
| Your HDL | If you are male | If you are female |
|---|---|---|
| 0.8 | Below the healthy line | Below the healthy line |
| 0.9 | Just under. Worth acting on | Under. Worth acting on |
| 1.1 | Healthy, near the floor | Just under the 1.2 line |
| 1.3 | Healthy | Healthy, near the floor |
| 1.6 | Comfortably healthy | Healthy |
| 2.0 | High, and usually welcome | High, and usually welcome |
| Above 2.5 | Unusual. See section 6 | Unusual. See section 6 |
One caveat covers the whole table. HDL on its own settles almost nothing, because what matters is your HDL beside your other lipid numbers. Section 5 explains how a qualified clinician puts them together.
2. Is there an official HDL chart by age?
No. Not in the UK, and not for adults. Your lab prints one HDL range and compares you with it whatever your birthday says.
The charts you find online are mostly American, mostly in mg/dL, and mostly built for total cholesterol rather than HDL. To convert, divide an mg/dL figure by 38.67. A US HDL of 50 mg/dL is 1.3 mmol/L here.
The real dividing line is sex. That split starts in the teens. HDL falls in boys through puberty as testosterone rises, and it never fully returns. Girls do not see the same drop, which is why adult men are measured against a lower bar.
Age does matter for your heart, of course. It just enters through the risk calculator your GP uses rather than through the HDL range itself. Our guide to cholesterol levels by age covers how the wider lipid picture shifts across the decades.
3. Does HDL change with age?
Far less than the other lipids do. That is the finding worth taking away, and it comes from UK data rather than a textbook.
A 2025 analysis in Open Heart read the risk markers of 501,389 UK Biobank participants. Total cholesterol and LDL flipped with age. They sat lower in women under 50 and higher in women over 60. HDL did not flip:
“High-density lipoprotein cholesterol (+0.31 mmol/L) and C reactive protein (+0.08 mg/L) were higher among women.”
— Open Heart, 2025, UK Biobank
So the female advantage in HDL held across the ages studied. One caveat: UK Biobank volunteers are healthier than the general population, and everyone was 40 or over at recruitment. It says nothing about your twenties.
Menopause is the exception people ask about most. It does reshape the lipid picture, mostly by pushing total cholesterol and LDL up rather than by collapsing HDL. We cover that shift in cholesterol after the menopause.
What moves your own HDL is mostly not the calendar. Smoking lowers it. Regular exercise raises it. So does losing weight around the middle. Your genes set a good deal of your starting point.
4. Why is HDL never read on its own?
Because it is a denominator. UK practice mostly uses HDL to scale the rest of your lipid panel, not as a standalone score.
- Your total to HDL ratio feeds the QRISK calculator your GP uses.
- Your non-HDL cholesterol is simply total minus HDL, and NICE leads on it.
- Your triglyceride to HDL ratio tracks how your body is handling fats and sugars.
That is why a lone HDL of 1.1 cannot be graded good or bad. Beside a total cholesterol of 4.2 it reads one way. Beside a total of 7.5 it reads another. A full cholesterol blood test gives you every line at once, which is the only way the ratios can be worked out.
If yours has come back under the line, our guide to a low HDL covers what tends to lie behind it. None of this is a diagnosis. It is how a qualified clinician narrows the question down.
5. Can your HDL be too high?
Probably, at the far end. For most people this will never be the question, because a high HDL is the uncommon result and the welcome one.
A 2017 study in the European Heart Journal followed 116,508 Danish adults. It reported that the link between HDL and death from any cause was “U-shaped for both men and women, with both extreme high and low concentrations being associated with high all-cause mortality risk”. The lowest risk sat at 1.9 mmol/L in men and 2.4 mmol/L in women.
Read that carefully. The upturn showed at 2.5 mmol/L and above, which very few people reach. It is a reason not to treat HDL as a score to maximise. It is not a reason to worry about a 1.8.
6. Which blood test includes HDL?
Any standard lipid profile. An NHS cholesterol check reports HDL, and so does every private cholesterol panel worth buying.
Helvy's Advanced Heart Health test measures HDL alongside LDL, total cholesterol, non-HDL, the total to HDL ratio, triglycerides, ApoB, Lp(a), hs-CRP and HbA1c. That is the context a lone HDL is missing. It is a home finger-prick kit, processed by UKAS-accredited UK labs.
Fasting overnight makes the triglyceride and cholesterol figures more accurate. If you cannot fast, your results are still useful, read as non-fasting.
If you are not sure which panel fits, the build-my-test tool walks you through it in about a minute.
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Helvy's home blood tests report HDL with your ratios worked out for you, and say what each one means. Samples are processed by UKAS-accredited UK labs.
Frequently asked questions
What is a normal HDL level by age in the UK?
There is no UK age chart for HDL. Adults are measured against one figure per sex. The British Heart Foundation calls above 1.0 mmol/L healthy for men and above 1.2 mmol/L healthy for women, at every age.
Is an HDL of 1.1 low?
It depends on your sex. For a man, 1.1 sits just inside the healthy range. For a woman it is just below the 1.2 line. Either way it is a prompt to look at your ratios rather than a verdict on its own.
Does HDL cholesterol drop as you get older?
Not much. Total cholesterol and LDL shift far more across the decades. In 501,389 UK Biobank adults, HDL averaged 0.31 mmol/L higher in women than men, and that gap persisted with age.
Why do women have higher HDL than men?
The split opens in the teens. HDL falls in boys through puberty as testosterone rises and does not fully recover. Girls do not see the same drop, so adult men are judged against a lower bar.
Does the menopause lower your HDL?
The menopause reshapes the lipid picture mainly by raising total cholesterol and LDL. HDL usually holds up better than people expect. If yours has fallen, your GP will read it beside the rest of the panel.
Can your HDL be too high?
At the far end, possibly. A 2017 European Heart Journal study of 116,508 Danish adults found a U-shaped link with all-cause mortality, with the lowest risk at 1.9 mmol/L in men and 2.4 mmol/L in women. The upturn appeared above 2.5 mmol/L, which few people reach.
How do I convert an American HDL number to UK units?
Divide the mg/dL figure by 38.67. So 40 mg/dL is about 1.0 mmol/L, 50 mg/dL is about 1.3 mmol/L and 60 mg/dL is about 1.55 mmol/L. UK labs report in mmol/L.
What raises HDL cholesterol?
Regular aerobic exercise, stopping smoking and losing weight around the middle all tend to nudge HDL up. Your genes set much of your starting point. No supplement has been shown to move it reliably.
Related guides
HDL Cholesterol UK
What HDL does and why it is called the good one.
Cholesterol Levels by Age UK
How the wider lipid picture shifts across the decades.
Heart health hub
Every heart and cholesterol guide in one place.
Blood Test Reference Ranges UK
Why 'normal' on a lab report is a population range, not a target.
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