What DHEA actually is
Dehydroepiandrosterone (DHEA) is produced primarily by the adrenal cortex and converted to testosterone, dihydrotestosterone, and estrogen in peripheral tissues. It's the most abundant circulating hormone in adult humans. DHEA-S (the sulfated storage form) is what's measured on labs.
Why it declines
DHEA-S peaks in the mid-20s and declines steadily, about 1-2% per year, until it's roughly 20% of peak by age 75. The decline correlates with reduced energy, libido, mood resilience, and immune function in many men, though causation is debated.
Testing DHEA-S
| Age range | Lab "normal" (µg/dL) | Optimal target |
|---|---|---|
| 30s | 120-520 | Upper third of range |
| 40s | 95-530 | 250-400 |
| 50s | 70-500 | 200-350 |
| 60s | 40-325 | 150-250 |
| 70+ | 40-300 | 120-200 |
Who should consider it
- Men over 50 with DHEA-S in the lower third for their age
- Men with low energy, mood, or libido alongside low DHEA-S
- Men on TRT with persistently low DHEA-S as adjunct
- Men with adrenal insufficiency or chronic stress histories
Not appropriate for: men with prostate cancer, men with normal-to-high baseline DHEA-S, young men with low T (address root causes first).
Dosing
- Starting dose: 25 mg daily, morning
- Maintenance: 25-50 mg daily
- Re-test at 8-12 weeks, target upper-mid DHEA-S range
- Quality matters: use USP-verified or pharmaceutical-grade products
Side effects
- Estradiol elevation, DHEA aromatizes; some men get water retention
- Acne, oily skin
- Hair loss (DHT pathway) in genetically predisposed men
- Prostate effects, uncertain in older men; monitor PSA
- Mood changes, usually positive but variable
The principle: DHEA supplementation is a small, targeted lever. It's not a TRT substitute. For men with documented low DHEA-S and modest expectations, it's a reasonable addition. For everyone else, it's optional.
Bottom line
DHEA supplementation occupies a specific niche: men with low documented levels who want a modest boost in androgen status. The effects are real but smaller than TRT. Test before supplementing, monitor estradiol and PSA, and don't expect transformation. For young men with "low T symptoms" but normal-range DHEA-S, address upstream issues first.