DHEA is the most abundant steroid hormone in the human body, and it serves as a raw material your cells convert into testosterone, estrogen, and other sex hormones. Produced mainly by the adrenal glands (small glands sitting on top of your kidneys), DHEA levels peak in your 20s and then steadily decline with age. By the time you reach your 60s or 70s, your body may produce only 10 to 20 percent of what it made at its peak. That decline is why DHEA supplements have drawn so much interest for everything from bone health to fertility to mood.
How DHEA Works in Your Body
DHEA itself isn’t the end product. It’s a precursor, meaning your body uses it as a starting ingredient to manufacture other hormones. Enzymes in your skin, bones, brain, fat tissue, and reproductive organs convert DHEA into testosterone or estrogen depending on the tissue’s needs. This conversion happens locally, so different parts of your body can fine-tune their own hormone levels without affecting the rest of your system.
DHEA circulates mostly in a sulfated form called DHEA-S, which acts as a reservoir. Your body can pull from that reservoir and convert it as needed. Blood tests for DHEA typically measure DHEA-S because it’s more stable throughout the day and gives a clearer picture of your overall levels.
How Levels Change With Age
The drop in DHEA is one of the most dramatic hormonal shifts of aging. For men in their 20s, normal DHEA-S levels range from about 280 to 640 micrograms per deciliter. By age 69 and older, that range falls to 28 to 175. Women follow a similar pattern: levels in the late teens can reach 145 to 395, but by the late 60s, they may sit as low as 13 to 130.
This steep decline has led researchers to investigate whether replacing DHEA could slow or reverse some aspects of aging. The results are mixed, with stronger evidence in some areas than others.
Bone Density in Postmenopausal Women
One of the better-supported uses of DHEA is protecting bone density after menopause. A pooled analysis of four randomized clinical trials found that 12 months of DHEA supplementation increased bone mineral density in the lumbar spine of postmenopausal women. A genetic study reinforced the connection, showing that naturally higher DHEA-S levels are linked to meaningfully greater spine bone density and a lower risk of forearm fractures in women.
The effect appears concentrated in the spine rather than the hip. Femoral neck (hip) bone density did not improve in the same trials. Clinical studies have used doses starting at 25 mg per day and going up to 100 mg per day for bone-related outcomes.
Fertility and Diminished Ovarian Reserve
DHEA has gained traction in fertility medicine, particularly for women over 40 with diminished ovarian reserve, meaning their ovaries respond poorly to stimulation during IVF. In a study published in Fertility and Sterility, women ages 40 to 47 who supplemented with 75 mg of DHEA daily for at least two months before egg retrieval saw clinical pregnancy rates roughly double compared to the years before the clinic adopted this protocol (23.3% versus 11.3%). The women in the later group were actually slightly older on average, making the improvement more notable.
This doesn’t mean DHEA is a fertility treatment on its own. It’s used as a preparation step before IVF, and the evidence is strongest for women whose ovarian reserve is already low. If you’re exploring this option, it’s typically managed by a reproductive endocrinologist who can monitor your hormone levels throughout.
Mood and Depression
DHEA appears to play a role in counterbalancing cortisol, the body’s primary stress hormone. In people with depression, the ratio of cortisol to DHEA tends to be significantly elevated. Research published in the American Journal of Psychiatry found that this imbalance was more pronounced the longer a depressive episode lasted.
Small controlled trials have shown antidepressant effects from DHEA supplementation, and some studies have noted improvements in cognition among middle-aged and elderly patients with depression. Doses in depression studies have varied widely, from 30 mg to 450 mg per day over six to eight weeks. The evidence is promising but still limited to relatively small trials, so DHEA isn’t a standard treatment for depression.
Skin Aging
Aging skin loses oil production, thickness, and hydration, particularly after menopause. A pilot study tested a 1% DHEA cream applied to the face and hands of postmenopausal women for four months. The treatment increased sebum (natural oil) production, which participants viewed positively since menopausal skin tends to become dry. Topical DHEA also showed signs of counteracting the papery, thinning appearance that characterizes hormone-related skin aging, with improvements in epidermal thickness and brightness.
Oral DHEA has shown similar skin benefits in women, improving hydration, pigmentation, and sebum production. These effects likely stem from DHEA’s conversion to sex hormones directly within skin cells.
What DHEA Doesn’t Appear to Help
Despite early enthusiasm, two years of DHEA supplementation did not improve insulin sensitivity, insulin secretion, or blood sugar metabolism in elderly men or women in a well-designed trial published by the American Diabetes Association. Women in the study did show a slight increase in insulin production, but this turned out to be a compensatory response to a simultaneous slight decrease in insulin sensitivity, resulting in no net benefit. If you’re looking at DHEA for metabolic health or diabetes prevention, the evidence doesn’t support it.
Side Effects and Risks
Because DHEA converts into sex hormones, its side effects are largely hormonal. Women may experience oily skin, acne, and unwanted hair growth in a male pattern (on the face, chest, or back). Men who combine DHEA with testosterone may develop enlarged breast tissue or reduced sperm counts.
People with mood disorders face a specific risk: DHEA can worsen psychiatric symptoms and increase the chance of manic episodes. This is particularly important for anyone with bipolar disorder. Because DHEA feeds into estrogen and testosterone production, anyone with a hormone-sensitive condition, such as certain breast or prostate cancers, should be cautious. The hormone-boosting effect that makes DHEA useful in some contexts is exactly what makes it risky in others.
Typical Doses Used in Research
There is no single recommended dose. Clinical trials have used different amounts depending on the condition being studied:
- Bone density: 25 to 100 mg per day
- Fertility (diminished ovarian reserve): 75 mg per day
- Depression: 30 to 450 mg per day
- Adrenal insufficiency: 25 to 50 mg per day
- Low libido in women: 10 to 50 mg per day in most studies, though some trials have gone higher
Most over-the-counter supplements come in 25 mg or 50 mg capsules. In the United States, DHEA is sold as a dietary supplement, not a prescription drug, which means quality and purity can vary between brands. Look for products that specify pharmaceutical-grade or micronized DHEA, since that’s the form used in clinical research. Getting your DHEA-S levels tested before and during supplementation gives you a baseline and helps you avoid pushing levels beyond a normal range for your age.