DHEA (dehydroepiandrosterone)

DHEA is a steroid hormone produced mainly by the adrenal glands, with smaller contributions from the ovaries. It is a precursor that the body converts into testosterone and estrogen in peripheral tissues. DHEA does not cycle dramatically across the menstrual cycle, but its baseline level shapes androgen balance and shifts substantially with age.

This is informational, not medical advice. Talk to your provider if you are considering DHEA supplementation, especially for fertility, age-related hormone changes, or any reason that involves dosing above what an over-the-counter product provides.

What DHEA does

DHEA itself has weak direct hormonal activity. Its main role is as a substrate:

  • Converts to testosterone. Peripheral tissues (skin, fat, muscle) express the enzymes that turn DHEA into testosterone.
  • Converts to estrogen. After conversion to testosterone, further conversion produces estradiol via aromatase. This pathway becomes more important after menopause when ovarian estrogen production stops.
  • Modulates neurosteroid pathways. DHEA and its metabolites act on GABA and NMDA receptors, with effects on mood and cognition that are still being characterized.
  • Affects immune function. DHEA has anti-inflammatory effects and supports certain immune cell populations.

DHEA is usually measured as DHEA-S (DHEA sulfate), the sulfated form that is more stable in blood and reflects adrenal output rather than transient ovarian contribution.

Age trajectory

DHEA-S has the most dramatic age decline of any hormone in the human endocrine system:

  • Peaks in the late 20s.
  • Declines by roughly 10% per decade starting in the 30s.
  • By age 70, levels are typically 20 to 30% of peak.
  • By age 80, levels are often under 15% of peak.

This decline (called adrenopause) happens independent of menopause and is part of why some perimenopausal and postmenopausal women report symptoms that do not respond to estrogen replacement alone.

DHEA and ovarian aging

The research interest in DHEA supplementation for fertility centers on women with diminished ovarian reserve. The theory: providing more androgen substrate to small follicles improves their response to FSH and increases the count of usable eggs.

The evidence:

  • Some small studies (notably from CHR in New York, where this protocol originated) suggest improved IVF outcomes in women with diminished reserve.
  • Larger trials and meta-analyses show mixed or modest effects.
  • The protocol is not standard in all fertility clinics, and the optimal dose, duration, and patient selection are debated.
  • Side effects (acne, hair changes, mood shifts) can be significant.

If you are considering DHEA for fertility, work with a reproductive endocrinologist who has experience with the protocol rather than self-supplementing.

DHEA and PCOS

In PCOS, DHEA-S is often elevated alongside other androgens. About 20 to 30% of women with PCOS have adrenal hyperandrogenism as a significant contributor. Testing DHEA-S helps distinguish adrenal versus ovarian sources of androgen excess, which can affect treatment choice.

Women with PCOS should not supplement DHEA. The problem in PCOS is too much androgen substrate, not too little.

DHEA and menopause symptoms

For postmenopausal symptoms, the evidence is narrower:

  • Vaginal DHEA (prasterone, brand name Intrarosa) is FDA-approved for postmenopausal vulvovaginal atrophy. The local effect on vaginal tissue is well documented.
  • Oral DHEA for mood, libido, energy has weaker evidence. Some women report benefit, but trials show small effect sizes.
  • DHEA does not replace HRT for menopausal symptoms when systemic estrogen is needed.

Testing

DHEA-S is the standard test. Reference ranges vary by age and lab; results should be interpreted against age-matched norms, not just the standard adult range.

  • Day of cycle does not significantly affect DHEA-S testing.
  • Morning blood draw is preferred since adrenal output has a circadian rhythm.
  • Stress and acute illness can transiently affect levels.

Side effects and safety considerations

DHEA is sold as a supplement in the US (banned or restricted in many other countries). Common side effects at doses above what the body produces naturally:

  • Acne and skin oiliness.
  • Hair loss or hirsutism.
  • Voice changes (irreversible at high doses over time).
  • Mood changes, irritability.
  • Decreased HDL cholesterol.
  • Potential interaction with hormone-sensitive cancers.

Doses commonly used in fertility protocols (25 mg three times daily) are well above what casual supplementation users take. Casual supplementation without testing and clinical oversight is not advisable.

What does not work as well

A few common DHEA claims to be skeptical of:

  • "DHEA for energy and aging." General anti-aging claims are not supported by trials in healthy adults.
  • "DHEA cream for menopause symptoms." Topical DHEA (not the FDA-approved vaginal product) has poor and unpredictable absorption.
  • DHEA for athletic performance. Banned by WADA. Evidence for performance benefit is weak.

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