DHEA-S Testing: Adrenal Androgen Assessment
Content last reviewed 2026-09-12 · Educational information — not medical advice
Quick answer
DHEA-S is the adrenal gland's major androgen precursor — almost entirely adrenal-origin (unlike testosterone's mixed sources), making it THE marker for adrenal androgen excess. Tested in PCOS workups, virilization investigations, and adrenal-mass characterizations.
Why DHEA-S specifically
Its sulfation renders it inert-yet-abundant (half-life ~12 hours, stable diurnally unlike erratic cortisol/DHEA). Elevated values point ADRENAL decisively: adrenal tumors, congenital adrenal hyperplasia enzyme blocks, or Cushing variants — ovarian androgen excess (PCOS) leaves DHEA-S relatively spared, enabling source discrimination.
Clinical applications
- PCOS phenotyping: distinguishing adrenal-androgen contributions from ovarian ones (treatment implications differ)
- Virilization/hirsutism workups: markedly elevated values (>600-800 µg/dL) raise adrenal-tumor flags demanding imaging
- CAH screening: 21-hydroxylase blocks shunt production DHEA-ward
- Pediatric precocious puberty: pubarche investigation
- Adrenal-incidentaloma characterization: masses secreting DHEA-S suggest malignancy-adjacent behavior
Age curves matter enormously
DHEA-S peaks around age 20-25 then declines steadily ('adrenopause') — 70-year-olds run quarter their youthful values NORMALLY. Children pre-adrenarche run near-zero; sudden childhood rises mark precocious adrenarche investigations. Interpreting without age-context guarantees errors.
Supplementation note
OTC DHEA supplements raise measured values directly — disclose usage or expect uninterpretable results. Anti-aging-marketing claims outpace evidence substantially; endocrine societies remain skeptical of broad supplementation.
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Frequently asked questions
Low DHEA-S causing my fatigue?
Age-appropriate decline isn't disease; replacement-trial evidence disappoints consistently outside adrenal-insufficiency contexts.
PCOS with high DHEA-S — different disease?
Adrenal-contributory PCOS subtype arguably responds differently to combination therapy — nuance worth establishing before medication selection.