What it's actually good for
DHEA (dehydroepiandrosterone) is a real hormone your adrenal glands make in larger quantities than almost anything else they produce, and a precursor your body converts into testosterone and estrogen. Levels peak in your twenties and fall steadily, dropping to roughly 20% of peak by age 70 — a decline that tracks age-related changes in bone, skin, and muscle closely enough that researchers have spent three decades asking: if you put DHEA back, do you get that function back?
The honest answer is: sometimes, in specific groups, for specific things — not across the board. This is not a vitamin correcting a deficiency the way vitamin D does. It's an exogenous hormone, and the effects, and side effects, follow accordingly.
What the research says
Skin, in older women (Grade B). The best single piece of evidence is the DHEAge study — a 1-year, placebo-controlled RCT in 280 adults aged 60-79, published in PNAS in 2000. At 50 mg/day, DHEA measurably improved skin hydration, pigmentation, and epidermal thickness. But the effect wasn't uniform: concentrated in women, strongest in women over 70, with little change in men. That's a real, mechanistically plausible finding (topical DHEA separately upregulates collagen genes in skin), but it's one large trial with an age- and sex-specific effect, not a settled result for every user.
Libido and sexual function (Grade C — genuinely mixed). This is contradictory, not just thin. A 2014 meta-analysis pooling 23 RCTs and nearly 1,200 postmenopausal women found no significant improvement in libido or sexual function from systemic DHEA. Three years later, a broader systematic review of 38 studies concluded DHEA did help — interest, arousal, lubrication, orgasm — but mainly in women already diagnosed with sexual dysfunction, not the general population. Fairest summary: not a reliable libido booster for the average postmenopausal woman, but it may help a subset with clinical sexual dysfunction, under medical supervision.
General anti-aging or vitality (Grade C). The premise — restore the blood level, restore the function — doesn't hold up well outside skin and bone in women. The DHEAge trial found no meaningful cognitive, strength, or quality-of-life benefit, particularly in men. A declining hormone level is a marker of aging, not necessarily a cause of it, and correcting the lab number hasn't translated into the broad rejuvenation effect the "anti-aging" framing implies.
How much, and which form
Trials mostly use 25 mg/day for women or 50 mg/day in mixed-sex aging studies — there's no evidence-backed dose for a healthy adult with normal DHEA levels, because that's not the population these trials studied. Oral micronized capsules are the standard OTC form. A separate, prescription-only vaginal DHEA product (prasterone) is FDA-approved for postmenopausal vaginal atrophy specifically — a different clinical use case, not what's covered here.
Safety & interactions
DHEA raises testosterone and estrogen levels — that's the mechanism, not a side effect. Expect androgenic effects (acne, oily skin, unwanted hair growth, occasionally hair loss or voice changes) at meaningful doses, especially in women. Avoid it if you have or are at elevated risk for hormone-sensitive cancers or liver disease, and don't use it in pregnancy or while breastfeeding.
One point that surprises people: DHEA is a banned substance in organized sport, prohibited at all times under WADA's Category S1 (Anabolic Agents). Athletes have been sanctioned for testing positive after taking an over-the-counter DHEA supplement they didn't realize was prohibited. This is informational only, not medical advice — talk to a clinician before starting, especially if you're on hormone therapy or managing a chronic condition.
How we picked the brand
Given that dose accuracy and manufacturing integrity matter more here than for an inert vitamin, a DHEA product earns a spot when its labeled dose matches what's actually used in the cited trials (25 mg or 50 mg, micronized), it avoids proprietary blends that obscure the actual amount, and the manufacturer publishes third-party Certificates of Analysis.