An androgen produced mainly by the adrenal glands.
What DHEA-S is
DHEA-S (dehydroepiandrosterone sulfate) is a type of androgen that comes almost entirely from the adrenal glands, the small glands that sit on top of the kidneys, rather than from the ovaries. Because its source is so specific, its level gives a fairly clear picture of the adrenal contribution to the body’s overall androgens. This is different from testosterone, which can come from both the ovaries and the adrenals. Androgens are a group of hormones that women naturally have in small amounts too, as part of a normal hormone balance. For a wider view of this system, see the hormones page.
Why doctors check it in PCOS
In PCOS, doctors sometimes check DHEA-S when androgen signs such as acne, excess hair, or scalp hair thinning are present. The aim is to gauge whether a high-androgen source is coming from the adrenal glands or more from the ovaries, as this can shape how the condition is assessed. This information helps a doctor build a fuller picture of the hormone balance. Even so, DHEA-S is interpreted alongside other tests such as testosterone and SHBG, not on its own, and it is not a test that everyone with PCOS needs. You can read more on the what is PCOS page.
What different readings can mean
A mildly raised DHEA-S is fairly common in some women with PCOS and is often not a worry on its own. A markedly high level, or one that is rising quickly, may prompt a doctor to look for causes other than PCOS, such as an adrenal gland problem. Because a single value is easy to misread, a doctor considers it alongside your age, symptom picture, and other test results before drawing any conclusions.
When to talk to a doctor
If you receive a DHEA-S result and are unsure what it means, bring the report to your appointment so it can be discussed in the right context. Only a doctor can interpret this reading in your personal situation and decide whether any further checks are needed. Any decision about medicine or next steps is best made with a doctor, not based on a single number.
This glossary is education, not diagnosis. For your own situation, ask a doctor or pharmacist.