How to Take DHEA: Dosage, Timing, Duration

The question "how much DHEA to take" sounds simple, but the answer depends on sex, age, baseline hormone level, and goal. DHEA is not a sports supplement like creatine but a precursor of sex hormones, so the editorial team does not provide individual regimens. Instead, we explain which amounts were used in clinical studies, how timing is related to physiology, and why without tests all "practice" turns into guesswork.

Why the "more is better" principle does not work with DHEA

The body of a young adult produces several tens of milligrams of DHEA every day, mainly in the adrenal glands. With age, synthesis gradually declines, and by age 70–80 the level of DHEA-S in the blood is only a small fraction of the values at 20–30. It is precisely this age-related dynamic that became the basis for the idea of "replacement" use.

However, the goal of the replacement approach is to return the hormone to the physiological range, not to exceed it. When the DHEA-S level goes beyond the upper limit of normal, the formation of androgens and estrogens in tissues increases, and with it the likelihood of acne, hair growth in women, and estradiol changes in men.

In addition, the effect of DHEA is not proportional to the dose in the sense that athletes expect. Studies with young men who took 100–150 mg per day showed no rise in testosterone or strength. Thus, increasing the amount does not unlock an "anabolic" potential but only intensifies the side effects.

Finally, it is worth remembering the legal status: in the USA DHEA is sold as a dietary supplement, whereas in EU countries and in Ukraine systemic DHEA is not an ordinary food product, and for athletes it is banned by WADA. This is another reason to discuss its use with a doctor.

Amounts studied in trials

Most often, clinical studies used 25–50 mg of DHEA per day for older people and for women with adrenal insufficiency. The classic work of Morales and colleagues in 1994 showed that 50 mg per day approximately restores DHEA and DHEA-S levels to values characteristic of young adults.

The same amount, 50 mg per day, was used in the two-year study by Nair and colleagues (New England Journal of Medicine, 2006) and in the European DHEAge study, the results of which were summarized by Baulieu and colleagues. In both cases the subjects were elderly people under medical supervision.

In women with adrenal insufficiency in the study by Arlt and colleagues, 50 mg per day normalized androgen levels but caused androgenic side effects in some participants. Therefore, in clinical practice lower amounts are often discussed for women and adjusted according to test results.

Higher amounts — 100–200 mg and more — appear in individual studies, particularly in sports physiology and psychiatry, but they are not the standard for replacement use and more often push hormones beyond the norm.

Timing and taking with food

The secretion of DHEA, like cortisol, follows a circadian rhythm and is regulated by ACTH: the highest concentrations are observed in the morning. Therefore, in most studies DHEA was taken once in the morning. This regimen mimics the natural dynamic and reduces the risk of sleep disturbances that are sometimes reported with evening intake.

By contrast, DHEA-S has a long half-life and is relatively stable in the blood throughout the day. This means that the exact hour of intake is not critical for the DHEA-S level, but evening intake is more often associated with agitation and worse falling asleep.

DHEA is a fat-soluble steroid molecule, yet there is little convincing data that taking it together with food substantially changes the result. Studies usually did not require strict adherence to conditions regarding food; it is more practical to take it every day at the same time so that tests reflect a stable state.

The number of doses per day in studies is usually one. Splitting it into several doses has no proven advantages and only complicates control of what a person actually receives.

Duration and monitoring of tests

Most controlled studies lasted from several months to two years. Long-term safety of use over many years has not been studied, so mindless "lifelong" use has no scientific basis.

The Endocrine Society's guideline on primary adrenal insufficiency suggests a trial course of DHEA for women with reduced libido or energy despite optimal baseline therapy, and stopping it if there is no benefit within about six months. This "try and assess" approach is reasonable to extend to other situations as well.

The main laboratory marker is serum DHEA-S. It is measured before starting use to make sure the level is truly low, and again after a few weeks to check whether the reading has gone beyond the age norm. For women it is also useful to assess testosterone, for men — estradiol and PSA.

Blood for monitoring is usually drawn at the same time of day and at approximately the same interval after intake so that the results can be compared. If levels go beyond the norm or side effects appear, the doctor reduces the amount or cancels the intake.

Common mistakes

The most common mistake is to start taking it without a test. If the DHEA-S level is already normal, an additional amount does not compensate for a deficit but creates an excess. In young people the natural level is usually high, so the point of "replacement" use for them is doubtful.

The second mistake is to copy amounts from bodybuilder forums. Higher amounts do not provide a proven anabolic effect but more often cause acne, hair loss, and hormonal shifts. For athletes undergoing doping control, this is also a direct violation of WADA rules.

The third mistake is to ignore product quality. Studies of DHEA content in commercial supplements have shown significant discrepancies between the declared and actual amounts. Without a standardized preparation, even a correctly chosen amount on paper may be wrong in practice.

• do not start without measuring DHEA-S;
• do not exceed the amounts studied in trials without a doctor;
• do not take it in the evening if sleep worsens;
• do not continue use if there is no benefit after a few months;
• do not combine it with other hormonal agents on your own.

Editorial conclusions

In clinical studies DHEA was most often taken at 25–50 mg once a day in the morning for several months, under monitoring of DHEA-S and other hormones.

Higher amounts provide no proven benefits for either health or athletic performance but increase the risk of side effects.

A sensible practice is a test before starting, a repeat check, an assessment of benefit after a few months, and stopping use if there is no result.

To complete the picture, read our articles "Side Effects of DHEA," "DHEA: Available Forms and Which to Choose," and "Who Should Not Take DHEA."

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. 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.
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. Baulieu EE, Thomas G, Legrain S, et al. Dehydroepiandrosterone (DHEA), DHEA sulfate, and aging: contribution of the DHEAge Study to a sociobiomedical issue. Proc Natl Acad Sci USA. 2000;97(8):4279–4284.
5. 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.
6. Bornstein SR, Allolio B, Arlt W, et al. Diagnosis and treatment of primary adrenal insufficiency: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2016;101(2):364–389.
7. Parasrampuria J, Schwartz K, Petesch R. Quality control of dehydroepiandrosterone dietary supplement products. JAMA. 1998;280(18):1565.