Dehydroepiandrosterone sulfate, usually called DHEAS, is the most abundant steroid hormone circulating in human blood. It’s produced primarily by the adrenal glands and serves as a raw material your body converts into sex hormones like testosterone and estrogen. DHEAS levels peak in your 20s, then steadily decline with age, which is why the hormone shows up in conversations about aging, fertility, and adrenal health.
How DHEAS Is Made
Your two adrenal glands, which sit on top of your kidneys, are the primary source of DHEAS. Specifically, it comes from the innermost layer of the adrenal cortex, called the zona reticularis. The adrenal glands first produce a hormone called DHEA, then an enzyme converts it into DHEAS by attaching a sulfate group. This sulfation is what gives DHEAS its remarkably long lifespan in the bloodstream.
During fetal development, the adrenal glands sulfate several different steroid precursors. In adults, DHEA becomes the dominant target of that process, which is why DHEAS concentrations are so much higher than those of other adrenal steroids.
DHEAS vs. DHEA
DHEA and DHEAS are closely related but behave very differently in the body. DHEA is cleared from the blood quickly, lasting only 1 to 3 hours before being broken down. DHEAS, by contrast, binds tightly to a blood protein called albumin and gets reabsorbed by the kidneys, giving it a half-life of nearly 14 hours. This makes DHEAS levels far more stable throughout the day, which is one reason doctors measure DHEAS rather than DHEA when they want to assess adrenal androgen production.
The concentration difference is dramatic: DHEAS circulates at roughly 1,000 times the level of DHEA. Think of DHEAS as a storage form of the hormone that your tissues can convert back into DHEA, and then into testosterone or estrogen, as needed.
What DHEAS Does in the Body
DHEAS itself has some direct activity, but its primary role is serving as a precursor. Once tissues convert it back into DHEA, that DHEA can become testosterone, dihydrotestosterone, or estradiol, the hormones that drive sexual development, muscle maintenance, bone density, and reproductive function. This conversion happens locally in tissues throughout the body, including fat, skin, bone, and the brain.
Beyond its role as a hormone precursor, DHEA and DHEAS interact with several receptor systems in the brain, influencing signaling pathways involved in memory, mood, and nerve cell protection. Animal studies show effects on the liver, kidneys, fat tissue, and central nervous system. DHEAS also appears to modulate immune function and inflammation, though the precise mechanisms are still being mapped out in humans.
How Levels Change With Age
DHEAS follows one of the most predictable age-related patterns of any hormone. In children, levels are very low from infancy through about age 5. Between ages 3 and 6, small clusters of cells in the adrenal cortex begin maturing into the zona reticularis, and DHEAS starts rising. This process, called adrenarche, marks the earliest stage of puberty-related hormonal change. By ages 6 to 10, children typically have DHEAS levels between 10 and 115 µg/dL.
Levels continue climbing through adolescence and peak between ages 20 and 30, when average concentrations reach roughly 10 µmol/L in men and 5 µmol/L in women. After that, production declines steadily. By age 70 and beyond, DHEAS levels may drop to 10 to 20 percent of their peak values. Researchers sometimes call this decline “adrenopause,” a parallel to menopause but involving the adrenal glands rather than the ovaries. Notably, cortisol (the body’s main stress hormone, also made by the adrenal glands) does not decline in the same way, which means the ratio between cortisol and DHEAS shifts significantly as you age.
Normal Reference Ranges
DHEAS levels vary by both age and sex. Men consistently have higher levels than women. Here are typical ranges used by clinical laboratories:
Females
- Ages 18 to 29: 45 to 320 µg/dL
- Ages 30 to 39: 40 to 325 µg/dL
- Ages 40 to 49: 25 to 220 µg/dL
- Ages 50 to 59: 15 to 170 µg/dL
- Ages 60 and older: less than 145 µg/dL
Males
- Ages 18 to 29: 110 to 510 µg/dL
- Ages 30 to 39: 110 to 370 µg/dL
- Ages 40 to 49: 45 to 345 µg/dL
- Ages 50 to 59: 25 to 240 µg/dL
- Ages 60 and older: less than 204 µg/dL
These ranges can vary slightly between laboratories, so your results should always be interpreted in the context of the specific lab’s reference values.
What High DHEAS Levels Mean
Elevated DHEAS is most clinically relevant in women and girls, where it can cause visible signs of excess male-type hormones. These include increased facial and body hair, acne, thinning hair at the crown of the head, deepening of the voice, menstrual irregularities, and unusual muscular development.
The most common conditions linked to high DHEAS include:
- Polycystic ovary syndrome (PCOS): A hormonal disorder affecting women of reproductive age that is one of the leading causes of female infertility. Roughly 20 to 30 percent of women with PCOS have elevated DHEAS.
- Congenital adrenal hyperplasia: An inherited condition in which the adrenal glands overproduce androgens. A milder, late-onset form (sometimes called nonclassic congenital adrenal hyperplasia) often goes undiagnosed until adulthood.
- Adrenal tumors: Both benign and cancerous adrenal tumors can drive DHEAS production well above normal.
- Ovarian tumors: In rare cases, a tumor on the ovary produces excess DHEAS.
What Low DHEAS Levels Mean
Low DHEAS is expected with aging, but abnormally low levels for your age group can point to problems with the adrenal glands or the pituitary gland (which sends signals telling the adrenal glands to produce hormones). Adrenal insufficiency, also known as Addison’s disease, is one cause. Severe illness, high levels of acute stress, and eating disorders like anorexia nervosa can also suppress DHEAS production.
Some epidemiological studies have linked unusually low DHEAS levels with increased mortality risk in men, along with mood disturbances and reduced well-being. A large French study (the DHEAge Study, published in the Proceedings of the National Academy of Sciences) found that individuals in the lowest quartile of DHEAS levels showed more behavioral and health problems than those with higher levels, though whether supplementing DHEAS actually corrects these issues remains an open question.
DHEAS During Pregnancy
Pregnancy causes a notable shift in DHEAS levels. In a longitudinal study of healthy pregnant women, average plasma DHEAS dropped from about 325 µg/dL in early pregnancy to roughly 120 µg/dL by week 38. This decline happens because the placenta rapidly converts maternal DHEAS into estriol, a form of estrogen critical to pregnancy. The fetal adrenal glands also produce DHEAS, which the placenta uses for the same purpose. Rising estriol levels during pregnancy are considered a marker of fetal well-being. At delivery, DHEAS levels roughly double from their late-pregnancy low, rebounding to about 205 µg/dL.
Why Your Doctor May Order a DHEAS Test
A DHEAS blood test is a simple draw with no special preparation. Doctors typically order it when evaluating signs of androgen excess in women (excess hair growth, acne, irregular periods), suspected adrenal gland disorders, early puberty in children, or infertility. Because DHEAS levels remain relatively stable throughout the day, unlike cortisol or DHEA, the test can be drawn at any time without worrying about daily fluctuations. The result, combined with other hormone tests, helps distinguish whether excess androgens are coming from the adrenal glands (where DHEAS is the primary product) or from the ovaries (which produce more testosterone directly).