DHEA-S Test: The Adrenal Hormone Behind Energy and Aging

Quick answer: A DHEA-S test measures dehydroepiandrosterone sulfate, a steroid hormone made almost entirely by the adrenal glands. It is the most abundant circulating steroid in the human body, and because levels decline predictably with age, clinicians use it as a practical marker of adrenal reserve and biological aging. A single blood draw is all it takes. Results are available within one to two business days, and the test costs between $29 and $90 cash-pay depending on the lab and whether a physician order is involved.

What does a DHEA-S test actually measure?

The DHEA-S test quantifies dehydroepiandrosterone sulfate, the sulfated and storage form of DHEA, in a serum sample. Unlike its parent hormone DHEA, the sulfated version has a half-life of around 10 to 20 hours, which makes it far more stable in the bloodstream. That stability is the main reason labs prefer DHEA-S over free DHEA for routine testing: a single morning draw gives a reliable snapshot without the wide daily fluctuations that affect cortisol or testosterone.

DHEA-S is produced in the zona reticularis of the adrenal cortex, with a small contribution from the ovaries and testes. The adrenals account for roughly 95 percent of circulating DHEA-S, which is why the test functions as a clean signal of adrenal output. The body converts DHEA-S back into DHEA and then downstream into androgens like testosterone and estrogens, so low DHEA-S often ripples into downstream sex hormone deficiencies, especially in women after menopause when the ovaries are no longer contributing much estrogen.

Most clinicians order it as part of a broader hormonal workup rather than in isolation. If you are building a complete picture of your hormonal health, pairing it with a complete blood panel gives you a much richer baseline to work from.

DHEA-S normal range by age and sex

Reference ranges for DHEA-S vary significantly by age and sex, and this is one of the most misread lab values because clinicians sometimes flag a 55-year-old woman as “low” using a young-adult reference instead of an age-matched one. Always compare your result to the age-specific range on your lab report.

Age group	Males (mcg/dL)	Females (mcg/dL)
20 to 29 years	280 to 640	65 to 380
30 to 39 years	120 to 520	45 to 270
40 to 49 years	95 to 530	32 to 240
50 to 59 years	70 to 310	26 to 200
60 to 69 years	42 to 290	13 to 130
70 and older	28 to 175	10 to 90

Values above are representative of Quest Diagnostics and Labcorp reference intervals as of 2025 and may shift slightly between labs due to assay methodology. Children and adolescents have their own reference ranges, and adrenal development (adrenarche) is actually tracked partly through rising DHEA-S levels starting around age 6 to 8.

Knowing where your number lands within the range matters too. A 45-year-old man at 97 mcg/dL is technically “normal” but sitting near the floor of his range. That context is relevant when symptoms are present.

One source of confusion is units. US labs usually report DHEA-S in micrograms per deciliter (mcg/dL), while many international labs report micromoles per liter (mcmol/L). To move between them, multiply a mcg/dL value by roughly 0.027 to get mcmol/L, or multiply mcmol/L by about 36.8 to get mcg/dL. If your result looks wildly off compared with the ranges above, check the units before you worry.

There is also a difference between a standard reference range and an optimal target. The reference range on your report is a statistical band built from a general population, so it includes plenty of people who are not especially healthy. Longevity-minded clinicians tend to look for a value in the upper half of the age-matched range rather than simply anywhere inside it. That said, higher is not automatically better, and there is no good evidence that forcing an older person’s DHEA-S up to young-adult levels buys better health. Treat the upper-half framing as a soft target, not a goal to chase with supplements.

A quick worked example

Say a 52-year-old woman gets a DHEA-S of 45 mcg/dL. Her lab flags nothing, because 45 sits inside the 26 to 200 band for her age group. But she is near the floor of that range, and she also reports fatigue, low libido, and thinning muscle. On its own the number proves nothing. Read alongside a low morning cortisol and those vague symptoms, it becomes one thread in a picture that justifies a proper endocrine workup rather than a shrug. Now flip it: the same 45 mcg/dL in a symptom-free 68-year-old is unremarkable and needs nothing but a note to recheck in a year. Same number, different meaning, because age and symptoms change what normal looks like.

What causes low DHEA-S?

Low DHEA-S is far more common than elevated DHEA-S, and the leading cause is simply age. DHEA-S peaks in the mid-20s and then declines at roughly 2 to 3 percent per year throughout adulthood, a phenomenon called adrenopause. By age 70, most people have DHEA-S levels that are 20 to 30 percent of their youthful peak.

Beyond aging, the following conditions and circumstances suppress DHEA-S:

• Primary adrenal insufficiency (Addison’s disease): The adrenal glands cannot produce adequate output of any steroid, including DHEA-S. Levels are typically very low across all ages.
• Hypopituitarism: If the pituitary is not releasing adequate ACTH, the adrenal cortex does not receive the signal to produce DHEA-S. ACTH deficiency suppresses adrenal androgen output disproportionately compared with cortisol.
• Chronic glucocorticoid use: Prednisone, dexamethasone, and other corticosteroids suppress the hypothalamic-pituitary-adrenal (HPA) axis. People on long-term inhaled or oral steroids commonly show below-range DHEA-S.
• Chronic psychological stress: Persistent high cortisol competes with DHEA-S production in the adrenal pathway. Some researchers describe a cortisol-to-DHEA-S ratio as a marker of chronic stress load.
• Anorexia nervosa and severe caloric restriction: The body down-regulates non-essential steroid production under starvation conditions.
• Insulin resistance and obesity: Adipose tissue can suppress adrenal androgen production through unclear mechanisms.

Symptoms associated with low DHEA-S include fatigue, low libido, reduced muscle mass, brain fog, and mood changes, but these overlap with so many other conditions that DHEA-S alone is never a standalone diagnostic. Talk to a clinician about your results before drawing any conclusions.

What does high DHEA-S mean?

Elevated DHEA-S almost always signals excess adrenal androgen production. The differential is narrower than for low levels, which makes a high result clinically more actionable.

The most common causes of high DHEA-S include:

• Polycystic ovary syndrome (PCOS): The most frequent cause of elevated DHEA-S in reproductive-age women. Adrenal hyperandrogenism contributes alongside ovarian androgen excess in a meaningful subset of PCOS cases.
• Congenital adrenal hyperplasia (CAH): Enzyme deficiencies (particularly 21-hydroxylase deficiency) shunt steroid precursors into androgen pathways. Both classic and non-classic (late-onset) CAH can produce elevated DHEA-S.
• Adrenal tumors: A unilateral adrenocortical adenoma or, rarely, carcinoma can produce excess DHEA-S. Adrenal carcinomas in particular tend to secrete DHEA-S preferentially and dramatically, sometimes reaching values above 700 to 800 mcg/dL. When DHEA-S is strikingly elevated alongside rapid virilization, imaging of the adrenals is warranted urgently.
• Cushing’s syndrome (ACTH-dependent): When a pituitary adenoma or ectopic source drives excess ACTH, it stimulates the entire adrenal cortex including the zona reticularis.
• DHEA supplementation: Over-the-counter DHEA is sold widely in the US and reliably raises DHEA-S within days. This is often overlooked when reviewing labs. Always disclose supplements to your ordering clinician.

In women, symptoms of high DHEA-S include acne, hirsutism (excess facial/body hair), irregular periods, and scalp hair thinning. In men, the effects are subtler because the adrenal androgen contribution is proportionally smaller relative to testicular testosterone.

DHEA-S, aging, and why some longevity-focused clinicians track it

DHEA-S has attracted attention in longevity medicine for a straightforward reason: its decline with age is one of the steepest and most consistent of any biomarker. Observational data from the Baltimore Longitudinal Study of Aging and similar cohorts have noted associations between higher DHEA-S in older adults and better outcomes for cardiovascular disease, cognitive function, bone mineral density, and all-cause mortality. The association is not causal in a proven sense, and intervention trials supplementing DHEA in healthy older adults have produced mixed and generally modest results.

What is clear is that DHEA-S sits upstream of multiple hormone pathways. In postmenopausal women, who have lost ovarian estrogen production, peripheral conversion of adrenal DHEA-S to estrogens becomes proportionally more significant. A woman with very low DHEA-S after menopause has less raw material for that conversion. Similarly, in older men, some fraction of circulating testosterone is derived from adrenal androgen precursors.

Functional medicine and longevity-focused clinicians often track DHEA-S as part of a broader hormonal panel, noting the ratio to cortisol and trends over time rather than a single value. That trend tracking is something to keep in mind when building a baseline. If you are trying to identify which best biomarkers to test for a comprehensive longevity picture, DHEA-S is a reasonable candidate, particularly for adults over 40.

The evidence does not yet support routine DHEA supplementation in healthy people simply because a number is age-appropriately low. The physiology is complex: DHEA-S converts not just to testosterone but to estrogens, and the downstream effects depend heavily on an individual’s enzyme activity, sex, and existing hormone levels.

How the DHEA-S test works: collection, turnaround, and what to expect

The DHEA-S test is a standard serum blood draw, meaning a venipuncture from the arm. There is no special prep required, though most labs prefer a morning collection to minimize intra-day variation. Fasting is not required, but many people fold DHEA-S into a morning fasting panel alongside metabolic markers.

Turnaround is typically one to two business days from when the specimen reaches the lab. Quest and Labcorp both run this test in-house. Results come back as a numeric value in micrograms per deciliter (mcg/dL) or micromoles per liter (mcmol/L) depending on the lab, alongside the reference range specific to your age and sex.

One technical note that matters in practice: DHEA-S does not require a special tube or unusual handling. Unlike some steroid hormone tests that require extraction-based immunoassays or mass spectrometry for accuracy, DHEA-S is reliably measured by standard immunoassay due to its high circulating concentration. That said, very high values (suggestive of an adrenal tumor) are often confirmed with LC-MS/MS to rule out assay interference.

What can throw off a DHEA-S result

A few things quietly skew this test. Recent DHEA supplementation is the big one: even a few days of over-the-counter DHEA can push your DHEA-S well above baseline, so stop it for four to six weeks before testing if you want a true reading. High-dose biotin, common in hair and nail supplements, can interfere with some immunoassays and produce falsely high or low values depending on the platform, so pause biotin for two to three days before the draw. Acute illness, poor sleep, and severe short-term stress can nudge the number, though DHEA-S is far more stable than cortisol on any given day. And because production drifts down over years, comparing a value taken today with one from five years ago tells you more about your trajectory than a single reading ever will.

If you are getting a draw anyway and want a full adrenal hormone picture, it is often worth capturing DHEA-S alongside cortisol (AM and sometimes PM), testosterone, and sex hormone binding globulin in one visit. Ordering them piecemeal over multiple draws just delays the whole picture and adds cost. That is the logic behind getting one clean, complete draw rather than chasing single tests one at a time. Here is how a full-body panel compares for anyone thinking about a comprehensive baseline.

How does DHEA-S fit with your other hormone markers?

DHEA-S rarely tells a clean story by itself. Its value comes from how it reads against the markers around it. The most useful pairing is with morning cortisol. Both come from the adrenal cortex, but cortisol reflects your immediate stress response while DHEA-S reflects longer-term adrenal androgen capacity. A pattern of high cortisol with low DHEA-S is one some researchers link to chronic stress load, and it is more informative than either number alone.

Testosterone is the next companion marker. In a woman with acne or unwanted hair growth, the question is whether the androgen excess comes from the ovaries or the adrenals. Testosterone points mostly to the ovaries, DHEA-S points mostly to the adrenals, so measuring both helps localize the source. In men, total and free testosterone carry most of the weight, and DHEA-S adds context rather than driving decisions. Thyroid hormones, fasting insulin, and sex hormone binding globulin round out the picture, since thyroid and insulin status both shape how the body makes and clears steroid hormones. This is exactly why ordering these together on one draw beats collecting them piecemeal over several visits.

How much does a DHEA-S test cost?

DHEA-S is one of the more affordable hormone tests. Cash-pay pricing ranges from about $29 to $90 depending on whether you order through a direct lab service, a physician, or a concierge platform.

Ordering pathway	Typical cash cost	Notes
Quest Diagnostics (direct via QuestDirect)	$49 to $79	No physician order required in most states
Labcorp (via Labcorp OnDemand)	$39 to $69	Same model, order online, draw at patient service center
Concierge or panel service (e.g., Function Health, Superpower)	Bundled into panel price	DHEA-S included in comprehensive panels; no a la carte option
Private physician order	$29 to $55 at contracted lab	Physician visit fee adds significant cost if not telehealth
Urgent care or CVS MinuteClinic	Varies; often $75 to $150 with visit fee	Less cost-efficient unless bundled with a visit already scheduled

HSA and FSA funds can generally be used for DHEA-S testing when ordered by a clinician. Self-ordered tests through direct-to-consumer platforms may require an HSA letter of medical necessity in some situations. Medicare covers DHEA-S when it is medically indicated, typically for evaluation of suspected adrenal pathology, PCOS, or delayed/precocious puberty.

Insurance coverage for DHEA-S ordered for general wellness or longevity purposes is inconsistent. Many plans require a diagnosis code tying the test to a specific clinical concern. If you want the test for general monitoring and your insurance is unlikely to cover it, the direct-to-consumer lab services are the most efficient route, usually resulting in a result in two business days for under $60.

When clinicians actually order this test (and when they skip it)

A DHEA-S test earns its place in a workup when there is a specific clinical question it can answer better than other tests. Experienced endocrinologists tend to order it in these scenarios:

• Workup of androgen excess in women (acne, hirsutism, irregular cycles) to distinguish ovarian from adrenal sources. Testosterone comes mostly from the ovaries; DHEA-S comes mostly from the adrenals. A high DHEA-S with normal or mildly elevated testosterone points toward adrenal contribution.
• Evaluation of precocious puberty in children, where rising DHEA-S signals premature adrenarche.
• Assessment of adrenal insufficiency (though cortisol stimulation testing is the primary diagnostic tool, DHEA-S helps complete the picture).
• Monitoring DHEA supplementation to ensure levels are not exceeding physiologic ranges.
• Longevity baseline panels in adults over 40, often alongside a adiponectin test and other metabolic and inflammatory markers.

Clinicians often skip DHEA-S in general fatigue workups where thyroid function, CBC, iron studies, and metabolic panels have not been checked first. It is not a first-line test for fatigue complaints. It also adds little in isolation when no clinical picture justifies the result.

The test is less commonly useful in men under 40 unless there is a specific concern about adrenal pathology, because the clinical consequences of adrenally-derived androgen variation are proportionally smaller in men with intact testicular function.

What to do with results: interpreting DHEA-S in context

A DHEA-S result should never be interpreted alone. Context matters in three directions: the clinical picture, other hormone levels, and trends over time.

If your DHEA-S comes back low and you have no symptoms, no action is typically required beyond monitoring. The normal age-related decline is not a disease state, and there is currently no evidence-based indication to supplement DHEA solely because a number falls below the young-adult peak in an otherwise healthy, asymptomatic person.

If you have symptoms (fatigue, low libido, cognitive fog) AND low DHEA-S AND low cortisol, the clinical picture points toward adrenal hypofunction, and a proper endocrine workup including ACTH stimulation testing is appropriate rather than self-supplementing.

If DHEA-S is elevated above the age-appropriate range, the next question is always: what is causing it? In a woman with hirsutism and irregular cycles, it suggests adrenal androgen excess and warrants 17-hydroxyprogesterone testing to rule out CAH. In someone with no androgen-excess symptoms who is taking OTC DHEA, stopping the supplement for 4 to 6 weeks and retesting is often the simplest first step.

For anyone pairing DHEA-S with other lab data, the albumin test and alkaline phosphatase test help fill out the metabolic and nutritional context that shapes how the body handles steroid hormone production and clearance.

FAQ

Is DHEA-S the same as DHEA?

No, but they are closely related. DHEA is the free hormone; DHEA-S is DHEA with a sulfate group attached, which is how the adrenal glands store and transport it. Most DHEA circulates as DHEA-S. Labs test DHEA-S because it is more stable, present at higher concentrations, and less subject to time-of-day variation than free DHEA. When you take an oral DHEA supplement, your body converts it largely into DHEA-S, which is why DHEA-S is the better monitoring marker for supplementation as well.

Can I order a DHEA-S test without a doctor?

In most US states, yes. Quest Diagnostics through QuestDirect and Labcorp through Labcorp OnDemand both allow consumers to order a DHEA-S test online, then go to a patient service center for the blood draw. The test cost is typically $39 to $79 without insurance or a physician order. A handful of states (including New York and New Jersey) restrict direct-to-consumer lab ordering under state law, so residents there may need a physician order or a telehealth service that provides one.

Does DHEA-S vary by time of day?

It has a mild diurnal rhythm but far less pronounced than cortisol. DHEA-S is slightly higher in the morning, and most labs draw it in the morning for standardization. Unlike cortisol, where a late-afternoon draw would be meaningfully different from a morning draw, a DHEA-S value drawn at noon versus 8am will not typically land in a different clinical category. Morning draws are still preferred for consistency, especially if you are tracking the value over time.

What is a good DHEA-S level?

“Good” depends heavily on age and sex. A 35-year-old woman with a DHEA-S of 160 mcg/dL is solidly within range. A 65-year-old woman with the same number is doing quite well for her age. The most useful framing is where you fall within the age-matched reference range and whether the value is trending over time. Clinicians who focus on longevity often look for values in the upper half of the age-matched range, but there is no strong evidence that pushing DHEA-S to young-adult levels in older people produces the health outcomes you would hope for.

Does DHEA supplementation actually work?

It depends on what you mean by “work.” DHEA supplements reliably raise DHEA-S levels. Whether that translates into meaningful clinical benefit for healthy adults with age-related decline is another question. The most credible evidence supports modest benefit for sexual function in postmenopausal women with documented deficiency, and intravaginal DHEA (prasterone) is FDA-approved for that indication. Systemic oral DHEA for energy, muscle, or cognition in otherwise healthy older adults has not consistently performed better than placebo in rigorous trials. DHEA is not benign at high doses: excess can cause acne, hair loss, and hormonal disruption, particularly in women.

Can a low DHEA-S cause hair loss?

Low DHEA-S itself is not a well-established cause of hair loss. Paradoxically, high DHEA-S can contribute to androgenic alopecia (scalp hair thinning) in genetically susceptible individuals, because excess adrenal androgens convert to DHT, which miniaturizes hair follicles. If you have hair loss alongside hormonal symptoms, the workup typically includes DHEA-S along with free and total testosterone, thyroid hormones, ferritin, and sometimes prolactin.

How is DHEA-S different from cortisol, and should I test both?

Cortisol and DHEA-S are both made in the adrenal cortex, but in different zones and with different regulatory signals. Cortisol is the primary stress hormone and reflects immediate HPA axis activity. DHEA-S reflects longer-term adrenal androgen capacity. They are sometimes described as opposing forces: cortisol is catabolic and immunosuppressive at high levels; DHEA-S has mild anabolic and immune-supportive properties. Chronically elevated cortisol with low DHEA-S is a pattern some researchers associate with chronic stress physiology. Testing both together gives a richer picture than either alone.

Is DHEA-S tested in routine physical exams?

Not typically. Standard annual physicals covered by insurance usually include a CBC, metabolic panel, lipid panel, and sometimes thyroid-stimulating hormone. DHEA-S is not part of most routine panels unless a clinician has a specific reason to order it. If you want it measured, you generally need to request it or order it through a direct-to-consumer lab service. As longevity medicine gains traction, more concierge practices and membership-based health platforms are including DHEA-S in their standard comprehensive panels.

How often should I retest DHEA-S?

For a healthy adult tracking a longevity baseline, once a year is plenty, since DHEA-S changes slowly. If you are investigating a specific problem, retest on a timeline that matches the intervention. After stopping an over-the-counter DHEA supplement, wait four to six weeks before rechecking so levels can settle. If a clinician is treating an adrenal or androgen-excess condition, follow their retest schedule, which is usually tied to symptom changes rather than the calendar.

Can chronic stress actually lower DHEA-S?

It can, over time. Under sustained stress the adrenal pathway favors cortisol production, and DHEA-S output tends to drift down. This is why the cortisol-to-DHEA-S ratio gets attention as a rough marker of chronic stress load. A single stressful week will not change the number much, but months of poor sleep, overtraining, or unrelenting pressure can show up as a lower reading alongside a higher cortisol.

Do I need to fast before a DHEA-S test?

No. DHEA-S does not require fasting, and food does not meaningfully change the result. The only reason many people fast is convenience, because DHEA-S often rides along with a morning metabolic or lipid panel that does require fasting, so it is easier to draw everything at once. A morning draw is preferred for consistency, not because of food.

Does DHEA-S affect fertility?

It can play a role at the extremes. Very high DHEA-S in women, often tied to PCOS or adrenal conditions, is associated with irregular ovulation and can complicate conception. Some fertility clinics also use DHEA supplementation in select women with diminished ovarian reserve, though the evidence is mixed and this should only happen under specialist supervision. For most people with a normal age-appropriate value, DHEA-S is not a fertility concern on its own.