DHEA sulfate (DHEA-S) is the stable, circulating form of DHEA, a hormone made mostly by your adrenal glands. A blood test shows adrenal androgen output. TelosRX explains what your number means.
DHEA gets marketed as a "youth hormone." The reality is less dramatic and more useful. DHEA sulfate is a lab marker that tells you how your adrenal glands are working.
Here's what it is, how it changes with age and how to read your result.
What Is DHEA Sulfate?
DHEA stands for dehydroepiandrosterone. It's a steroid hormone made mainly by the adrenal glands, which sit on top of your kidneys. Smaller amounts come from the ovaries and testes.
DHEA is a precursor, meaning a building block. Your body converts it into androgens like testosterone and into estrogens.
Most DHEA in your blood carries a sulfate group attached. That form is DHEA sulfate, or DHEA-S. It's the body's large circulating reserve of DHEA.
Why Labs Measure DHEA-S Instead of DHEA
Plain DHEA swings up and down through the day. DHEA-S is far steadier. That makes it a better snapshot.
- Higher levels in the blood make it easier to measure.
- Less daily fluctuation means timing matters less.
- Adrenal-specific: DHEA-S comes almost entirely from the adrenal glands.
Because of that last point, DHEA-S is often used to tell adrenal androgen sources apart from ovarian or testicular ones.
How DHEA-S Changes With Age
DHEA-S peaks in early adulthood, then falls steadily. A classic 1984 study in the Journal of Clinical Endocrinology & Metabolism measured it in 981 men and 481 women aged 11 to 89.
| Group | Peak age | Average at peak | Average after age 70 |
|---|---|---|---|
| Men | 20 to 24 | About 347 mcg/dL | About 67 mcg/dL |
| Women | 15 to 19 | About 247 mcg/dL | About 45 mcg/dL |
Values were converted from ng/mL and rounded. Men had significantly higher levels than women between ages 20 and 69. A small add-on study in four men also found about 19% week-to-week variation within each person.
The takeaway: a "low" number at 65 can be entirely normal for your age. Always compare your result with an age- and sex-matched reference range.
Why a Provider Might Order a DHEA-S Test
DHEA-S isn't a routine screening test. It's usually ordered for a reason, such as:
- Signs of excess androgens in women: unwanted facial or body hair, acne or irregular periods
- Checking adrenal function when other adrenal tests are off
- Evaluating early or delayed puberty in children
- Investigating an adrenal mass found on imaging
- Part of a broader hormone panel when symptoms suggest a hormone imbalance
It's often paired with testosterone, cortisol and other markers. Our guide to a longevity biomarker panel covers how these fit together.
How the DHEA-S Test Works
It's a standard blood draw from a vein in your arm. Fasting usually isn't required. Some labs prefer a morning sample, so follow the instructions on your order.
Tell your provider about any supplements you take. DHEA supplements will raise your result. Some medications, including hormone therapies and steroids, can also shift it.
Results are usually reported in mcg/dL or µmol/L. Reference ranges differ between labs, so use the range printed on your report.
What High DHEA-S Levels Can Mean
A high result isn't a diagnosis on its own. It's a clue that prompts more testing. Possible causes include:
- Polycystic ovary syndrome (PCOS), where mild elevations are common
- Congenital adrenal hyperplasia, an inherited enzyme condition
- Adrenal tumors, which may produce very high levels
- DHEA supplement use, a frequent and easily missed cause
Women with high DHEA-S may notice acne, excess hair growth or irregular cycles. A provider will look at the full picture before drawing conclusions.
What Low DHEA-S Levels Can Mean
The most common reason for low DHEA-S is simply age. Other possible causes include:
- Adrenal insufficiency, when the adrenal glands underproduce hormones
- Pituitary problems that reduce signals to the adrenals
- Long-term steroid medications, which can suppress adrenal output
- Serious chronic illness, which can lower levels temporarily
Fatigue and low libido are often blamed on low DHEA-S. But those symptoms have many causes. A low number alone doesn't prove DHEA is the problem.
Should You Take DHEA If Your Level Is Low?
Not without a provider's input. Over-the-counter DHEA is sold as a dietary supplement. It is not FDA-approved for anti-aging or general hormone support.
Major guidelines are cautious. A 2014 Endocrine Society guideline recommends against routine DHEA use in women, citing limited data on effectiveness and safety.
There are metabolic questions too. A 2020 meta-analysis of 23 trials found DHEA supplements didn't change total or LDL cholesterol. But they lowered HDL ("good") cholesterol, mainly in women.
Since DHEA converts into testosterone and estrogen, it can also cause androgen-type side effects like acne or hair changes. A provider can weigh whether it makes sense for you. For timing basics, see our step-by-step guide on when to take DHEA.
How TelosRX Approaches Hormone Health
A single lab value rarely tells the whole story. TelosRX looks at hormones in context: symptoms, history and a full panel.
TelosRX is an online-first, asynchronous telehealth service. You share your history and recent labs through a secure intake. A licensed provider reviews it on their schedule, with no live appointment needed.
Any prescription is subject to medical approval by a licensed provider, and approval is not guaranteed. Explore hormone and longevity care for women or for men.
Frequently Asked Questions
What is the difference between DHEA and DHEA sulfate?
DHEA is the active hormone made mainly by the adrenal glands. DHEA sulfate is the same molecule with a sulfate group attached, which makes it more stable in the blood. Most circulating DHEA exists as DHEA sulfate. Labs usually measure DHEA-S because it fluctuates far less during the day than plain DHEA.
What is a normal DHEA-S level?
Normal DHEA-S levels depend heavily on age and sex, and each lab sets its own reference range. Levels peak in early adulthood and decline steadily afterward. Men generally run higher than women. Always compare your result with the age- and sex-specific range printed on your lab report rather than a generic number.
Do I need to fast for a DHEA sulfate test?
Fasting is usually not required for a DHEA-S blood test. Some labs prefer a morning draw, so follow the instructions that come with your order. Tell your provider about any supplements or medications you take, especially DHEA, hormone therapy or steroids, because these can change your result.
What causes high DHEA sulfate in women?
Common causes include polycystic ovary syndrome, congenital adrenal hyperplasia and DHEA supplement use. Less often, an adrenal tumor can produce very high levels. Symptoms may include acne, excess facial or body hair and irregular periods. A provider will usually order more tests before reaching any conclusion.
Can low DHEA-S cause fatigue?
Low DHEA-S is often linked with fatigue in popular articles, but the evidence is weak. Levels naturally fall with age, and fatigue has many causes, including sleep, thyroid, iron and mood. A low result alone does not prove DHEA is the cause. A provider can review it alongside other labs.
Does DHEA-S affect testosterone levels?
DHEA-S is a precursor your body can convert into testosterone and estrogen. In women, adrenal DHEA is a meaningful source of androgens. In men, most testosterone comes from the testes, so DHEA-S has a smaller effect. Supplementing DHEA can shift hormone levels, which is why provider oversight matters.
TelosRX is LegitScript-certified. Compounded medications are not FDA-approved and are prepared under federal compounding regulations. Approval is subject to evaluation by a licensed provider; approval is not guaranteed. Individual results vary. TelosRX operates as an online-first, asynchronous telehealth service.
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