DHEA: Supplement Forms and How to Choose Between Them

DHEA occupies an odd place on American store shelves. It is a steroid hormone precursor, yet under federal law it is sold as a dietary supplement next to fish oil and multivitamins. It comes as capsules, tablets, drops, creams and a "non-hormonal" cousin called 7-keto DHEA. Our editorial team looked at how these forms differ, what the clinical research actually measured, and why the choice of form matters less than the question of whether to take DHEA at all.

What DHEA is and why the form matters

Dehydroepiandrosterone (DHEA) is produced mainly by the adrenal glands, with smaller contributions from the gonads and brain. Most of it circulates as the sulfated version, DHEA-S, which acts as a large reservoir that tissues can convert back into active DHEA when needed. Blood levels peak in the mid-twenties and then decline steadily, so that by age 70 many people have only a fraction of their young-adult concentration.

DHEA itself has weak hormonal activity. Its importance lies in what cells turn it into: androstenedione, testosterone, dihydrotestosterone and estradiol. This "intracrine" conversion happens inside peripheral tissues such as skin, fat, bone and muscle, which is why the effects of supplementation vary so much from person to person and between men and women.

Because DHEA is a precursor rather than a finished hormone, the route of delivery changes which metabolites dominate. Swallowed DHEA passes through the liver first, where much of it is sulfated or converted. Skin creams and vaginal inserts bypass the liver and act more locally. The dose that reaches a given tissue, and the balance between androgenic and estrogenic products, therefore depends partly on the form a person chooses.

That is also why simple comparisons on a label can mislead. Twenty-five milligrams of an oral capsule and twenty-five milligrams of a cream are not equivalent exposures, and neither tells you what will happen to your testosterone or estradiol without a blood test.

Oral capsules and micronized tablets

Oral DHEA is the most studied form by a wide margin. Clinical trials in older adults typically used 25 to 50 mg per day, and some used 100 mg. In the frequently cited trial by Morales and colleagues, 50 mg daily restored DHEA and DHEA-S levels in men and women aged 40 to 70 to young-adult ranges within weeks. In women, oral DHEA raised testosterone noticeably; in men, the androgen change was small.

Micronized products use finely milled powder to improve dissolution and absorption. Most research-grade DHEA has been micronized, so "micronized" on a label mostly signals a product closer to what was tested rather than a fundamentally different compound. Swallowed DHEA shows a strong first-pass effect, producing a large rise in DHEA-S relative to free DHEA.

The main practical advantages of oral forms are predictable dosing and a substantial evidence base. The drawbacks are the same ones that apply to any hormone precursor taken by mouth: effects on sex hormones that cannot be fully predicted, possible reductions in HDL cholesterol at higher doses in some studies, and androgenic side effects such as oily skin, acne and unwanted hair growth in women.

Quality is a real issue. Independent analyses of US supplements over the years have found DHEA products whose actual content differed considerably from the label. Because the FDA does not approve supplements before sale, choosing a product with third-party testing is one of the few levers a consumer has.

Sublingual, topical and vaginal forms

Sublingual drops and lozenges are marketed as faster-acting because they are partly absorbed through the lining of the mouth. Formal pharmacokinetic data for over-the-counter sublingual DHEA are limited, and some of the dose is inevitably swallowed. Claims of superior efficacy should be read as marketing until better data appear.

Topical creams and gels avoid first-pass metabolism, which tends to yield a lower DHEA-S rise per milligram but a different spread of metabolites. Absorption through skin varies with the site of application, the vehicle and individual skin characteristics. Compounded creams from pharmacies are not standardized, and transfer to partners or children through skin contact is a theoretical concern with any hormone cream.

The only DHEA product approved by the FDA as a drug is prasterone in a vaginal insert, cleared in 2016 for moderate to severe painful intercourse caused by menopausal vulvovaginal atrophy. Trials led by Labrie showed local benefits with minimal change in circulating sex steroids, which illustrates how strongly the route of delivery shapes the effect.

7-keto DHEA and the "non-hormonal" pitch

7-keto DHEA (7-oxo-DHEA) is a natural metabolite that is not converted into testosterone or estrogen. Supplement makers promote it for metabolism and weight management, citing small studies that reported modest increases in resting metabolic rate or weight loss when combined with diet and exercise. These studies were short, small and not consistently replicated.

The lack of conversion to sex hormones does make 7-keto DHEA a different proposition for people specifically worried about androgenic side effects. However, "does not raise testosterone" does not mean "has no effects," and long-term safety data are thin.

For athletes, the label "non-hormonal" is dangerously misleading. The World Anti-Doping Agency lists 7-keto-DHEA, along with DHEA itself, among prohibited anabolic agents. A competitor who chooses this form believing it is "safe for testing" can still receive a sanction.

Legal status, sport and who should avoid DHEA

In the United States, DHEA was explicitly exempted from the Anabolic Steroid Control Act of 2004, which is why it remains available without a prescription. In Canada, the UK and much of the EU, by contrast, it is treated as a prescription medicine or controlled product. Travelers and online buyers should be aware that legality changes at the border.

In sport, the situation is unambiguous. DHEA is prohibited at all times under the WADA Code and by the NCAA, and it has featured in numerous US Anti-Doping Agency cases. Urine tests can detect exogenous DHEA through carbon isotope ratio analysis, and contaminated or mislabeled supplements have caused positive tests.

Several groups should avoid DHEA unless a physician directs otherwise:

• people with a personal or strong family history of hormone-sensitive cancers (breast, prostate, ovarian, endometrial);
• pregnant or breastfeeding women and anyone trying to conceive without medical supervision;
• adolescents and young adults whose own DHEA production is at its peak;
• people with polycystic ovary syndrome, liver disease or a history of mood disorders;
• competitive athletes subject to drug testing.

Endocrine Society guidance on androgen therapy in women recommends against routine DHEA use because of inconsistent benefit and limited long-term safety data. In adrenal insufficiency, where DHEA production is genuinely low, a trial by Arlt and colleagues reported improvements in well-being and sexuality in women, but this is a specific medical scenario managed by endocrinologists.

Conclusions of the Editorial Team

Oral and micronized DHEA have the most data behind them, vaginal prasterone is the only FDA-approved form, and sublingual and topical products rest on far thinner evidence. 7-keto DHEA avoids conversion to sex hormones but has limited research and remains banned in sport.

In young, healthy athletes, the evidence for meaningful gains in strength or muscle from DHEA is weak. Brown and colleagues found that oral DHEA did not raise testosterone or improve resistance-training adaptations in young men, and large trials in older adults, such as the one by Nair and colleagues, showed little benefit for body composition or performance.

If you are considering DHEA because of fatigue, low libido or age-related changes, the more productive first step is a medical evaluation with DHEA-S, sex hormones and a broader workup. You may also find our articles on testosterone blood testing, adrenal fatigue myths and how to read a supplement facts label useful.

References

1. Morales AJ, Nolan JJ, Nelson JC, Yen SS. Effects of replacement dose of dehydroepiandrosterone in men and women of advancing age. J Clin Endocrinol Metab. 1994;78(6):1360–1367.
2. Brown GA, Vukovich MD, Sharp RL, et al. Effect of oral DHEA on serum testosterone and adaptations to resistance training in young men. J Appl Physiol. 1999;87(6):2274–2283.
3. Nair KS, Rizza RA, O'Brien P, et al. DHEA in elderly women and DHEA or testosterone in elderly men. N Engl J Med. 2006;355(16):1647–1659.
4. Arlt W, Callies F, van Vlijmen JC, et al. Dehydroepiandrosterone replacement in women with adrenal insufficiency. N Engl J Med. 1999;341(14):1013–1020.
5. Labrie F, Archer DF, Koltun W, et al. Efficacy of intravaginal dehydroepiandrosterone (DHEA) on moderate to severe dyspareunia and vaginal dryness, symptoms of vulvovaginal atrophy, and of the genitourinary syndrome of menopause. Menopause. 2016;23(3):243–256.
6. Wierman ME, Arlt W, Basson R, et al. Androgen therapy in women: a reappraisal: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2014;99(10):3489–3510.