Summary
DHEA-Sulphate (DHEA-S) is the sulphated form of dehydroepiandrosterone, produced almost entirely by the adrenal glands. It is the most abundant steroid hormone in the body and serves as a precursor for testosterone and oestrogen. DHEA-S is measured to assess adrenal androgen production — useful in investigating PCOS, hirsutism, adrenal disorders, and unexplained androgen excess.
Because DHEA-S is produced almost exclusively by the adrenal glands and has a long, stable half-life, it is an excellent marker of adrenal androgen output — more stable than DHEA itself, which fluctuates through the day.
DHEA-S peaks in early adulthood and then declines steadily with age, which has driven interest in DHEA supplementation for ‘anti-ageing’, though evidence of benefit is limited.
Clinically, elevated DHEA-S points to an adrenal source of androgen excess — relevant in women with hirsutism, acne, or irregular periods, and in distinguishing adrenal from ovarian causes. Very high levels can indicate congenital adrenal hyperplasia or, rarely, an adrenal tumour. Low DHEA-S may accompany adrenal insufficiency.
What It Is
DHEA-S is the sulphate ester of dehydroepiandrosterone, formed by the enzyme SULT2A1, predominantly in the adrenal zona reticularis. It is the most abundant steroid in human circulation, acting as a reservoir that can be converted peripherally to active androgens and oestrogens.
Unlike most steroids, DHEA-S has a long half-life and minimal diurnal variation, making a single measurement reliable. Its near-exclusive adrenal origin makes it a specific marker of adrenal androgen production.
Reference ranges are strongly age- and sex-dependent, peaking in the 20s and declining thereafter (e.g. adult men ~2.0–9.0 μmol/L; women ~1.0–7.0 μmol/L, declining with age). Markedly elevated DHEA-S suggests an adrenal source of androgen excess.
Functions
Androgen and oestrogen precursor
Serves as a reservoir converted in peripheral tissues to testosterone and oestrogen, contributing to sex hormone levels.
Adrenal androgen marker
Its near-exclusive adrenal origin makes DHEA-S a specific indicator of adrenal androgen production.
Distinguishing androgen excess sources
Helps separate adrenal from ovarian causes of androgen excess in women with hirsutism or acne.
Adrenal function assessment
Very high levels may indicate congenital adrenal hyperplasia or adrenal tumour; low levels may accompany adrenal insufficiency.
Reference Ranges
DHEA-Sulphate (DHEA-S)
Measured in μmol/L| Status | Range (μmol/L) | Range (μg/dL) | What it means |
|---|---|---|---|
| Low | < 1.0 | < 37 | Low for age — may reflect adrenal insufficiency or normal age-related decline. |
| Normal | 1.0–9.0 | 37–331 | Within the age-appropriate adrenal androgen range. |
| Elevated | > 9.0 | > 331 | Elevated — suggests an adrenal source of androgen excess; investigate for CAH or adrenal tumour if very high. |
Reference ranges are highly age- and sex-dependent and decline with age. Always interpret against age-specific ranges. Markedly elevated DHEA-S warrants investigation for adrenal pathology.
Symptoms of Imbalance
DHEA-S abnormalities are usually detected when investigating androgen excess or adrenal disorders rather than from specific symptoms.
- Fatigue and low energy
- Low libido
- Symptoms of adrenal insufficiency (with other features)
- Often no specific symptoms (age-related decline)
- Acne and oily skin
- Hirsutism (excess facial and body hair) in women
- Irregular periods
- Scalp hair thinning
- Deepening voice (with marked excess)
- Signs of virilisation (rare, severe excess)
Causes of Imbalance
- Normal age-related decline
- Adrenal insufficiency (Addison's disease)
- Hypopituitarism
- Corticosteroid therapy (suppresses adrenal androgens)
- PCOS (mild elevation common)
- Congenital adrenal hyperplasia
- Adrenal tumours (adenoma or carcinoma)
- Cushing's syndrome
- DHEA supplementation
FAQs
Because DHEA-S comes almost entirely from the adrenal glands, a high level points to an adrenal source of androgen excess. Mild elevation is common in PCOS. Marked elevation can indicate congenital adrenal hyperplasia or, rarely, an androgen-secreting adrenal tumour, and warrants further investigation — especially if symptoms of virilisation appear rapidly.
DHEA-S production by the adrenal glands peaks in early adulthood and then falls steadily, so that by the 70s levels are a fraction of their youthful peak. This natural decline is why DHEA-S must always be interpreted against age-specific reference ranges, and why a ‘low’ value in an older person is often simply normal for age rather than a sign of disease.
DHEA supplements are marketed for ‘anti-ageing’, energy, and libido, but the evidence of benefit in healthy people is weak and inconsistent. DHEA is a hormone precursor and can raise testosterone and oestrogen, with potential side effects including acne, hair changes, and unknown long-term risks. Supplementation should only be considered under medical supervision, and is sometimes used in genuine adrenal insufficiency.
When investigating excess hair growth in women, DHEA-S helps localise the source of androgens. A high DHEA-S points to the adrenal glands, while a normal DHEA-S with raised testosterone points more to the ovaries (as in PCOS). This distinction guides further investigation and treatment, so DHEA-S is a standard part of the androgen excess work-up.
References
- Rainey WE, Nakamura Y. Regulation of the adrenal androgen biosynthesis. J Steroid Biochem Mol Biol. 2008;108(3–5):281–286. View source
- Martin KA, et al. Evaluation and treatment of hirsutism in premenopausal women: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2018;103(4):1233–1257. View source
- Labrie F, et al. DHEA and its transformation into androgens and estrogens in peripheral target tissues. Front Neuroendocrinol. 2001;22(3):185–212. View source