Hormones
DHEA-S Levels by Age: Reading Yours Against Your Decade
Reviewed by a qualified clinician · analysed at UKAS-accredited UK labs (ISO 15189)
Last reviewed August 20267 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.
QUICK ANSWER
DHEA-S has no single adult range. UK labs read it against your age and sex. Royal Cornwall NHS pathology reports 6.5 to 14.6 umol/L for men aged 20 to 24, falling to 1.3 to 9.8 by 55 to 64. Women run lower at every age. A drop with each decade is expected.
Not sure which markers you need? Build your test →You are 48. Your DHEA-S comes back at 4.1 umol/L, and the internet tells you that is the level of a much older man. Then you find a chart from a different lab and it says you are fine.
Both can be true. DHEA-S is one of the few hormones where the reference range moves under you as you age, so the number on its own means very little. What it means depends on the decade you are in.
1. What is DHEA-S, and what does it do?
DHEA-S stands for dehydroepiandrosterone sulphate. It is a hormone your adrenal glands make. The adrenals are two small glands that sit on top of your kidneys.
Think of it as raw material rather than a finished product. Your body converts DHEA-S into testosterone and oestrogen in the tissues that need them. In women past the menopause, it becomes the main source of those hormones.
Labs measure the sulphated form for a practical reason. Plain DHEA swings through the day, so a morning sample and an afternoon sample disagree. DHEA-S sits steady for hours, which makes one blood draw worth reading.
2. DHEA-S levels by age: the UK chart
These are the adult bands published by Royal Cornwall Hospitals NHS Trust pathology, in micromoles per litre (umol/L). Read the row for your age.
| Age | Men | Women |
|---|---|---|
| 20 to 24 | 6.5 to 14.6 | 3.6 to 11.1 |
| 25 to 34 | 4.6 to 16.1 | 2.6 to 13.9 |
| 35 to 44 | 3.8 to 13.1 | 2.0 to 11.1 |
| 45 to 54 | 3.7 to 12.1 | 1.5 to 7.7 |
| 55 to 64 | 1.3 to 9.8 | 0.8 to 4.9 |
Two things stand out. The whole band slides down each decade, and women sit lower than men throughout.
Notice how wide each band is. A man of 30 can sit at 4.6 or at 16.1 and both are inside the range. That spread is normal biology, not imprecision. It also means the interesting comparison is your own result a year or two from now, tested the same way at the same lab.
The same lab lists a separate band for 65 to 70. Past 65 the published ranges vary a lot between labs and between assay methods, so read your number against the range printed on your own report rather than any chart online. Some UK labs also report in ug/dL instead. To convert ug/dL to umol/L, multiply by 0.027.
3. Why does DHEA-S fall every decade?
Because the part of the adrenal gland that makes it shrinks. DHEA-S climbs through childhood, peaks in your twenties, then slides. The clinical review of adrenal androgens in Endotext puts a figure on it.
“progressively decline with advancing age by around 2 to 5% per year”
— Adrenal Androgens and Aging, Endotext
Compound 2 to 5% a year across four decades and the arithmetic is brutal. The same review notes the drop reaches 80 to 90% of peak production by the eighth or ninth decade of life. Clinicians call it adrenopause.
So a 55 year old with a lower reading than a 25 year old is not unwell. They are 55. The useful question is where you sit inside your own decade, and whether anything else in your bloods points the same way.
4. What does a low DHEA-S result mean?
Start with age, because age explains most low readings. If yours sits inside the band for your decade, it is doing what it should. Below that band, these are the things a clinician looks at:
- Long courses of steroid tablets, which quieten the adrenals.
- Problems with the pituitary gland, which signals the adrenals.
- Adrenal insufficiency, where the glands underproduce.
- Serious illness or long periods of very low body weight.
None of those is read from DHEA-S alone. A low result is a reason to speak to a GP, not a conclusion. Take the printed report with you.
5. What does a high DHEA-S result mean?
High readings matter more in women, because DHEA-S is a source of androgens. Androgens are the hormone family testosterone belongs to. A raised level can sit behind acne, unwanted hair growth or irregular periods, and it is one of the markers a clinician reviews during a PCOS conversation.
In men a modestly raised DHEA-S usually says less. Very high readings in either sex are followed up properly by a clinician rather than read off a chart.
One practical note. DHEA is a prescription-only medicine in the UK, so it is not sold here as an over-the-counter supplement. If you have taken it abroad or bought it online, tell whoever reads your result. It will lift the number.
6. Which blood test reports your DHEA-S
The marker is DHEA-S. Helvy's Complete Male Hormones panel (£119) reports it alongside testosterone, free testosterone, SHBG, LH, FSH, prolactin and albumin. That grouping is the point. DHEA-S on its own rarely changes what you do next.
Take the sample in the morning. DHEA-S itself is stable, but the testosterone measured beside it peaks early and falls through the day, so a morning draw makes the whole set readable.
If you want the fuller picture on what the marker does, our DHEA-S blood test guide covers the cortisol ratio and the testing detail. To choose your own markers, the build-my-test tool walks you through it.
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See your DHEA-S next to the hormones it feeds
Helvy's home blood tests report DHEA-S with plain-English context, read against your age rather than one flat adult range. Samples are processed by UKAS-accredited UK labs.
Frequently asked questions
What is a normal DHEA-S level for my age?
Royal Cornwall NHS pathology reports 6.5 to 14.6 umol/L for men aged 20 to 24 and 1.3 to 9.8 for men aged 55 to 64. Women run 3.6 to 11.1 at 20 to 24 and 0.8 to 4.9 at 55 to 64. Labs differ, so use the range on your own report.
Is it normal for DHEA-S to fall with age?
Yes. The Endotext review of adrenal androgens describes levels that progressively decline with advancing age by around 2 to 5% per year, reaching 80 to 90% below peak by the eighth or ninth decade. Clinicians call it adrenopause.
Why is my DHEA-S low at 40?
Most often because 40 is not 25. Check your number against the 35 to 44 band first. If it sits below that band, steroid tablets, pituitary problems and adrenal underproduction are the things a GP would look at next.
Does DHEA-S need a morning blood test?
DHEA-S itself is stable through the day, which is why labs measure it rather than plain DHEA. A morning sample still helps, because the testosterone and cortisol read alongside it do move through the day.
What does high DHEA-S mean in women?
DHEA-S is a source of androgens, the hormone family testosterone belongs to. A raised level can sit behind acne, unwanted hair growth or irregular periods. It is one of several markers a clinician reviews, never a result you read on its own.
How do I convert DHEA-S from ug/dL to umol/L?
Multiply the ug/dL figure by 0.027. A US report of 200 ug/dL is roughly 5.4 umol/L. Most UK labs report in umol/L, so American charts often look wildly different for the same blood.
Related guides
DHEA-S Blood Test UK
What the marker does, and the cortisol ratio explained.
Testosterone Levels by Age
The other hormone that slides decade by decade.
Normal Cortisol Levels UK
The adrenal hormone read alongside DHEA-S.
SHBG Levels by Age UK
The protein that decides how much testosterone you can use.
Adrenal Fatigue Blood Test UK
What the adrenals actually do, and what bloods can show.
Blood Test Reference Ranges UK
Why normal on a lab report is a population range, not a target.