DHEA: Amounts Used in Studies and What They Changed
DHEA is sold on a shelf next to vitamins, but it is a hormone precursor: the body converts it into testosterone and oestrogen. That single fact explains its trial record, its side effects, its banned status in most sports, and why it is prescription-only in several countries where it is over-the-counter elsewhere.
Published studies have most often used 25–50 mg a day of oral DHEA, with 50 mg the common amount in ageing and wellbeing research and 25 mg in some fertility protocols; adrenal insufficiency research has used similar amounts under medical supervision. A 2025 meta-analysis in postmenopausal women found DHEA supplementation raised testosterone levels, with a smaller and less consistent effect on estradiol. Because it converts to sex hormones, DHEA is not appropriate to self-prescribe in hormone-sensitive conditions, and it is prohibited in competitive sport under the World Anti-Doping Code.
DHEA amounts reported in published research
| Use case | Amount reported in sources | What to know |
|---|---|---|
| Ageing and wellbeing studies | 50 mg per day, oral | The most frequently used amount in older-adult research. Source |
| Postmenopausal hormone research | 25–50 mg per day | Meta-analysed trials reported rises in circulating testosterone. Source |
| Fertility protocols (IVF adjunct) | Commonly 75 mg per day in divided doses in studied protocols | Used under fertility-clinic supervision; evidence quality is mixed. Source |
| Competitive sport | Prohibited | DHEA is a prohibited anabolic agent under anti-doping rules at all times. Source |
Figures are amounts reported in the cited sources, not a personal recommendation. Your own amount depends on your health, medicines and blood work.
A precursor, not a nutrient
DHEA and its sulfate DHEA-S are made mainly by the adrenal cortex, peak in the twenties and decline steadily with age. That decline is the entire premise of the supplement: restore the youthful level, restore something youthful. The body converts DHEA into androgens and oestrogens in peripheral tissues, so what any given person gets from a 50 mg capsule depends on their sex, age, body composition and enzyme activity.
This is why DHEA behaves unlike a vitamin. There is no requirement, no deficiency state in the nutritional sense, and no upper intake level. The relevant framing is endocrine: you are adding substrate to a hormone pathway, and the measurable consequences are hormonal.
It is also why blood testing is more meaningful here than with most supplements. DHEA-S, total and free testosterone and, in women, estradiol are the markers a clinician would actually follow.
What the trials measured
The clearest finding across the literature is biochemical rather than clinical: DHEA raises circulating androgens. A 2025 meta-analysis of randomised trials in postmenopausal women reported a significant increase in testosterone with DHEA supplementation and a smaller, less consistent effect on estradiol.
Clinical endpoints have been far less consistent. Studies of mood, cognition, bone density, body composition and sexual function in older adults have produced mixed and generally modest results, and several well-conducted trials found no meaningful benefit over placebo. Reviews of nutritional adjuncts in IVF describe the fertility evidence for DHEA in poor ovarian responders as inconsistent and of limited quality.
The one setting with a coherent rationale is adrenal insufficiency, where DHEA production is genuinely absent — and even there, guidance treats it as an individual trial of therapy under specialist care rather than a standard.
- Biochemical effect: reliable rise in testosterone.
- Clinical benefit: inconsistent across mood, cognition, body composition.
- Fertility use: studied, but evidence quality is limited.
Who should not take it
Because DHEA converts to sex hormones, the standard cautions are hormone-sensitive conditions: breast, ovarian, uterine and prostate cancers, endometriosis and uterine fibroids. Anyone with a personal or strong family history of these should not add DHEA without oncology or endocrinology input.
Androgenic effects are the most commonly reported problem in women — acne, oily skin, facial hair, scalp hair thinning and voice changes — and some are slow to reverse. In men, high intakes can raise oestrogen through aromatisation, with breast tenderness or gynaecomastia reported.
DHEA can also affect lipid profiles, with reductions in HDL cholesterol described in trials, and there are reports of mood disturbance and irritability. Liver-related effects have been reported at high intakes, which is another reason for supervision rather than open-ended use.
Product quality and sport
Analyses of over-the-counter DHEA products have repeatedly found content that differs from the label, in both directions. For a hormone precursor that is a meaningful problem, and third-party tested products are the minimum sensible standard.
DHEA is on the World Anti-Doping Agency prohibited list as an anabolic agent, banned in and out of competition. It is also prescription-only in a number of countries, including the United Kingdom, Canada and Australia, so buying it abroad and importing it can be a legal question as well as a medical one.
What the published studies found
Each entry below links straight to the paper or the health authority page so you can read the original rather than take our word for it.
- Impact of DHEA supplementation on testosterone and estradiol levels in postmenopausal women: a meta-analysis of randomised controlled trials. Diabetol Metab Syndr. 2025.
Meta-analysis of randomised controlled trials
DHEA supplementation significantly increased circulating testosterone in postmenopausal women, with a smaller and less consistent effect on estradiol, confirming that the compound acts as an androgen precursor at commonly used amounts.
- Nutritional supplements and IVF: an evidence-based approach. Reprod Biomed Online. 2024.
Evidence review of supplements used in fertility treatment
Reviews DHEA among adjuncts studied in poor ovarian responders and describes the supporting evidence as inconsistent and limited in quality, cautioning against routine use outside clinical judgement.
- Office of Dietary Supplements, National Institutes of Health. Dietary Supplements for Exercise and Athletic Performance.
Health-authority reference document
Summarises DHEA use in performance contexts, notes weak evidence for strength or body-composition benefit, and records that DHEA is a prohibited substance in competitive sport.
Side effects reported in the literature
Commonly reported
- Acne and oily skin
- Facial hair growth and scalp hair thinning in women
- Irritability, agitation or mood change
- Breast tenderness reported in men
Serious, seek medical advice
- Stimulation of hormone-sensitive cancers including breast and prostate
- Reductions in HDL cholesterol reported in trials
- Voice deepening in women, which may not fully reverse
- Liver-related effects reported at high intakes
Summarized from NIH Office of Dietary Supplements. Report anything unexpected to your own doctor or pharmacist.
Interactions to check with a pharmacist
| Medicine or condition | What sources report |
|---|---|
| Hormone therapy and oral contraceptives | Adds androgen and oestrogen substrate on top of prescribed hormones. Source |
| Anastrozole, tamoxifen and other hormone-blocking treatment | Directly opposes the purpose of the treatment; not appropriate without oncology input. Source |
| Insulin and diabetes medicines | Effects on insulin sensitivity have been reported; monitoring may need adjusting. Source |
| Competitive sport testing | Prohibited as an anabolic agent in and out of competition. Source |
This is not a complete interaction list. Check your own medicines with a pharmacist before combining anything.
This page is reference material, not medical advice. Supplements interact with prescription medicines and with each other. Talk to a doctor or pharmacist before starting anything, especially if you are pregnant, breastfeeding, managing a health condition or taking prescription medicine.
Frequently asked questions
What DHEA amounts have studies used?
Most research has used 25–50 mg a day orally, with 50 mg the common amount in ageing and postmenopausal studies. Some fertility protocols studied 75 mg a day in divided doses under clinic supervision.
Does DHEA raise testosterone?
Yes. A 2025 meta-analysis of randomised trials in postmenopausal women found a significant increase in circulating testosterone, with a smaller effect on estradiol. That biochemical effect is far better established than any clinical benefit.
Who should avoid DHEA?
Anyone with a hormone-sensitive condition — breast, ovarian, uterine or prostate cancer, endometriosis or fibroids — and anyone competing in tested sport, where DHEA is a prohibited anabolic agent.
Does DHEA help with fertility?
It has been studied as an IVF adjunct in poor ovarian responders, but evidence reviews describe the results as inconsistent and of limited quality. It is a fertility clinic's decision rather than a self-directed supplement.
Are DHEA side effects reversible?
Acne, oily skin and mood change usually settle after stopping. Voice deepening and some hair changes in women may not fully reverse, which is why the androgenic effects are worth taking seriously early.
Is DHEA legal?
It is sold over the counter in the United States but is prescription-only in several countries including the UK, Canada and Australia, and it is banned in competitive sport. Check your own jurisdiction before ordering.
Keep reading
Sources
- Impact of DHEA supplementation on testosterone and estradiol levels in postmenopausal women: a meta-analysis of randomised controlled trials. Diabetol Metab Syndr. 2025.
- Nutritional supplements and IVF: an evidence-based approach. Reprod Biomed Online. 2024;48(3).
- Office of Dietary Supplements, National Institutes of Health. Dietary Supplements for Exercise and Athletic Performance.
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