DHEA-S is the adrenals most abundant hormone product, a reservoir of mild androgen that peaks at 25 and falls to a fifth by age 75. That steep lifelong decline made it a favorite longevity marker, though supplementation trials have been underwhelming.
Standard range versus optimal range
| Framework | DHEA-S value | Source |
|---|---|---|
| Women 20-30, typical | about 100-400 µg/dL | Age-stratified references |
| Men 20-30, typical | about 150-500 µg/dL | Age-stratified references |
| By age 70 | often below 60-100 µg/dL | Age-stratified references |
When it runs high
High DHEA-S points to adrenal androgen excess. In women with acne, hair growth and irregular cycles it supports an adrenal contribution, and very high values, above roughly 700 µg/dL, raise the possibility of an adrenal tumor.
- Polycystic ovary syndrome, adrenal component
- Congenital adrenal hyperplasia
- Adrenal adenomas or carcinomas when very high
- DHEA supplementation
- Puberty and young adulthood, physiological
When it runs low
Low DHEA-S usually reflects adrenal aging, called adrenopause, and in most people needs no treatment. Very low values with fatigue and low sodium raise the question of true adrenal insufficiency, which needs formal testing.
- Normal aging, the dominant cause
- Adrenal insufficiency or pituitary failure
- Chronic glucocorticoid use suppressing the adrenals
- Chronic illness
The aging curve in a single number
No mainstream hormone shows aging as cleanly as DHEA-S. Production peaks in the mid-twenties and declines about two percent per year thereafter, so a 75-year-old typically carries a fifth of their youthful level. The sulfated form circulates for hours, giving a stable reading without the pulsatility of other hormones, which is why one random sample suffices. Whether the decline causes aging effects or merely marks them remains the open question.
What the trials actually showed
Two years of DHEA replacement in older adults restored youthful blood levels but did not improve muscle strength, insulin sensitivity or quality of life in the landmark randomized trials. The Endocrine Society reviewed this evidence in its 2014 androgen therapy guideline and advised against routine DHEA supplementation in women, a position that extends naturally to most men. The honest summary is that raising the number is easy and changing outcomes is unproven.
Where the test earns its place
DHEA-S is genuinely useful in two situations. In a woman with androgen excess it separates adrenal from ovarian sources and flags the rare adrenal tumor when very high. In suspected adrenal insufficiency a low value supports the diagnosis. For longevity tracking it serves best as a descriptive marker of adrenal aging rather than a target to manipulate.
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