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Hormones

DHEA-Sulphate

DHEA-S (dehydroepiandrosterone sulphate) is the most abundant steroid hormone in the body, produced primarily by the adrenal glands. It serves as a precursor to both testosterone and oestrogen. DHEA-S levels peak in the mid-20s and decline steadily at roughly 2-3% per year, making it one of the most reliable biomarkers of biological ageing.

Optimal Ranges

Clinical (NHS) Range

4.34-12.2 µmol/L (male)

µmol/L

Performance-Optimised Range

7.0-12.0 µmol/L

µmol/L

The clinical range defines what is considered medically “normal” — broad enough to cover 95% of the population. The performance range reflects where research and clinical experience suggest most people feel and function at their best.

Why It Matters

Why DHEA-S matters for performance

DHEA-S is a master upstream hormone — low levels can impair the production of downstream androgens including testosterone. For men in their 30s and beyond, declining DHEA-S correlates with reduced lean muscle mass, increased visceral fat, lower energy, and impaired immune function. Research shows that men with higher DHEA-S levels have better cardiovascular outcomes and cognitive function. It is also a sensitive marker of adrenal stress — chronically elevated cortisol depletes DHEA-S, making the DHEA-S:cortisol ratio a useful measure of stress resilience.

Symptoms

Signs your levels may be off

Low / Deficiency

  • Fatigue and low stamina
  • Loss of muscle mass despite training
  • Low libido
  • Poor stress tolerance
  • Dry skin and joint stiffness

High / Excess

  • Acne and oily skin
  • Hair loss (androgenic pattern)
  • Aggression or irritability

Dietary Sources

Foods that support DHEA-S levels

No significant dietary sources — DHEA is produced endogenouslyStress management directly supports DHEA productionQuality sleep (7-9 hours) optimises adrenal outputRegular moderate exercise supports healthy levelsWild yams contain diosgenin (a DHEA precursor) but conversion in humans is minimal

Supplementation

Evidence-based supplementation

DHEA supplementation (25-50mg daily) is available over-the-counter in some countries but is a controlled substance in the UK and requires a prescription. Self-supplementation is not recommended without blood testing and medical supervision, as excess DHEA can convert to oestrogen via aromatase. The most effective strategy for most men is addressing upstream factors: reducing chronic stress (which depletes DHEA via cortisol competition), optimising sleep, maintaining healthy body composition, and ensuring adequate zinc and vitamin B6 (cofactors in steroid hormone synthesis).

Research

Key study

DHEA in elderly women and DHEA or testosterone in elderly men

Nair KS, Rizza RA, O'Brien P, et al.

New England Journal of Medicine (2006)

DOI: 10.1056/NEJMoa054629

Related Biomarkers

Hormones

Total Testosterone

Optimal: 20-30 nmol/L

Thyroid

TSH (Thyroid Stimulating Hormone)

Optimal: 1.0-2.0 mIU/L

Vitamins & Minerals

Vitamin D (25-OH)

Optimal: 100-150 nmol/L

Related Guides

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Complete Guide to Blood Tests

What to test and why it matters

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This content is for educational purposes only and does not constitute medical advice. Your data suggests areas for optimisation, but any concerns should be discussed with a qualified healthcare professional. If your results flag values outside safe ranges, we recommend consulting your GP.