What DHEA is and how it works

DHEA (dehydroepiandrosterone) is a hormone your body makes naturally in the adrenal glands, the small organs that sit on top of your kidneys. Your body converts DHEA into testosterone and estrogen, the sex hormones that influence muscle, bone, mood, and sexual function. DHEA levels peak in your 20s and decline steadily after that—by age 70, most people have about 10 to 20 percent of the DHEA they had at 25.

The idea behind DHEA supplementation is straightforward: if lower DHEA correlates with aging, replacing it might slow or reverse some age-related changes. The research, however, shows a more complicated picture. DHEA does raise blood levels of the hormone and its downstream products (testosterone and estrogen), but whether that translates to real benefits in healthy people remains an open question.

DHEA is sold over the counter in the United States as a dietary supplement, not a drug, which means the FDA does not review it for safety or effectiveness before it reaches shelves. The dose in supplements typically ranges from 25 to 100 mg per day, though some products contain more.

Key Takeaways

  • DHEA is a hormone your body naturally produces that declines with age; supplements raise blood levels but effects on healthy people are not yet proven.
  • The strongest evidence exists for bone density in older women and possibly for mood in people with depression, but studies are small and results are mixed.
  • DHEA can raise testosterone and estrogen levels, which may increase risk of hormone-sensitive cancers, acne, and hair loss in people genetically prone to these.
  • Most research has been done in older adults or people with specific medical conditions; effects in young, healthy people are largely unknown.
  • DHEA is not regulated by the FDA before sale, so purity and dose accuracy vary between brands.

Bone density in older women

The most consistent evidence for DHEA comes from studies of bone health in postmenopausal women. A randomized controlled trial published in the New England Journal of Medicine in 2013 followed 280 women over age 60 for one year. Women who took 50 mg of DHEA daily showed modest gains in bone mineral density in the spine and hip compared to those who took placebo. The effect was real but small—roughly 1 to 2 percent improvement.

Other smaller trials have found similar results, though not all studies show benefit. The mechanism appears to be that DHEA raises estrogen levels, and estrogen helps preserve bone. However, the clinical significance of a 1 to 2 percent gain is unclear—it is not known whether this translates to fewer fractures in real life. No long-term studies have tracked whether women who take DHEA actually break fewer bones as they age.

For men, the evidence is weaker. A few studies suggest DHEA may help bone density in older men, but the data are limited and inconsistent.

Mood and depression

Several small studies have examined whether DHEA improves mood or helps with depression. A randomized trial of 46 people with major depression found that adding DHEA (90 mg per day) to standard antidepressant medication improved symptoms more than the medication alone over six weeks. Another trial in 23 people with depression found similar results. These are encouraging signals, but the studies are tiny and have not been replicated in larger groups.

The theory is that DHEA influences serotonin and other neurotransmitters involved in mood regulation, but the exact mechanism is not well understood. It is also unclear whether DHEA works for people with depression who are not already on medication, or whether the effect persists beyond a few weeks or months.

For people without depression, there is almost no evidence that DHEA improves mood or mental clarity.

Sexual function and libido

DHEA is sometimes promoted for sexual desire and function, particularly in older adults. A few small trials suggest it may help with sexual satisfaction in women, and possibly with erectile function in men, but the evidence is sparse and the studies are short (usually four to six weeks). One randomized trial of 52 women found that 50 mg of DHEA daily improved sexual satisfaction and orgasm frequency over 12 weeks, but another trial of similar size found no effect.

The mechanism would involve DHEA's conversion to testosterone and estrogen, both of which influence sexual response. However, the inconsistency across studies and the small sample sizes mean this remains an emerging claim rather than an established benefit. It is also not clear whether the effect is specific to DHEA or whether it straightforward reflects the placebo effect, which is strong in sexual function research.

Risks and side effects

Because DHEA raises testosterone and estrogen, it carries the same risks as hormone replacement therapy. The most significant concern is for people with a personal or family history of hormone-sensitive cancers—breast cancer, prostate cancer, or ovarian cancer. While the absolute risk from short-term DHEA use is not precisely known, the hormone elevation is real and measurable, and long-term use could theoretically increase cancer risk. This is not proven, but it is a legitimate concern that should be discussed with a doctor before starting DHEA.

Other common side effects include acne, oily skin, hair loss (in people genetically prone to male-pattern baldness), mood changes, and sleep disruption. Women may experience facial hair growth or voice deepening at higher doses. These effects usually reverse when DHEA is stopped, but they can be bothersome while taking it.

DHEA may also interact with medications, particularly those that affect hormone levels or are metabolized by the liver. People taking birth control, hormone replacement therapy, or medications for diabetes or heart disease should discuss DHEA with their doctor before use.

What the research does not show

Despite decades of interest, DHEA has not been shown to slow aging, improve muscle strength in healthy people, boost athletic performance, or enhance cognitive function in people without cognitive decline. Several large trials have tested these claims and found no benefit. A 2006 review of DHEA research by the Cochrane Collaboration concluded that evidence for most claimed benefits is weak or absent.

Most DHEA research has been conducted in older adults (typically over age 60) or in people with specific medical conditions like depression or sexual dysfunction. Effects in younger, healthy people are largely unknown because few studies have included them. This means that claims about DHEA for "anti-aging" or "performance enhancement" in young adults rest on very little evidence.

Quality and purity concerns

Because DHEA is sold as a dietary supplement, manufacturers are not required to prove the dose on the label matches what is actually in the bottle, nor are they required to test for contaminants. Independent testing by organizations like ConsumerLab has found that some DHEA products contain significantly less DHEA than labeled, while others contain more. A few products have been found to contain unlisted pharmaceutical ingredients.

If you are considering DHEA, buying from a manufacturer that has been tested by a third party (such as NSF International or USP) reduces but does not eliminate this risk. Even then, the dose you receive may vary from bottle to bottle.

Frequently Asked Questions

Does DHEA work better for men or women?

The strongest evidence is in postmenopausal women for bone density. For men, the evidence is much weaker. For sexual function and mood, the data are too limited to say whether one sex benefits more than the other.

Is DHEA safe to take long-term?

Long-term safety is not well established. Most studies last weeks to months, not years. The main concern is whether sustained elevation of testosterone and estrogen increases cancer risk, which is not known. Anyone considering long-term use should discuss it with a doctor, especially if they have a family history of hormone-sensitive cancer.

Can DHEA help with weight loss or muscle gain?

Despite marketing claims, controlled trials have not found that DHEA helps healthy people lose weight or gain muscle. A few small studies suggest it may help preserve muscle in older adults, but the effect is modest and not consistent across studies.

Will DHEA show up on a drug test?

DHEA itself may not, but its metabolites (testosterone and estrogen) can be detected by sensitive hormone tests. Athletes should know that DHEA is banned by most sports organizations, including the NCAA and professional leagues, because it can be converted to performance-enhancing steroids.

What dose is typically used in research?

Most studies use 25 to 100 mg per day, with 50 mg being common. Higher doses increase the risk of side effects without clear evidence of greater benefit. There is no established "optimal" dose.