DHEA
The unconjugated form of DHEA — which fluctuates through the day, unlike the stable sulfated form (DHEA-S).
DHEA-S is the better test for routine assessment because it's stable. Unconjugated DHEA is mainly useful in specific adrenal workups.
Order DHEA-S instead, and the reason is arithmetic. Circulating DHEA-S sits at concentrations hundreds of times higher than free DHEA, has a half-life measured in hours rather than minutes, and shows almost no diurnal variation — so one draw represents your status. Unconjugated DHEA is pulsatile and tracks the cortisol rhythm, which means a morning and an afternoon sample from the same healthy person can differ enough to change the interpretation. There is no defensible optimal range for DHEA because there is no defensible reason to have measured it.
Check a DHEA result against this range →
What DHEA actually measures — the analyte, and the assay
The analyte is unconjugated dehydroepiandrosterone — free DHEA, not DHEA-sulfate. They are different molecules with different behavior, and almost every practical fact about this test follows from the difference. DHEA carries a hydroxyl at C3; DHEA-S carries a sulfate ester there, added by SULT2A1 in the adrenal and the liver. That one group makes DHEA-S far more water-soluble, keeps it bound in circulation, and stretches its half-life from minutes to hours, which is why DHEA-S circulates at roughly a thousand times the molar concentration of free DHEA.
That thousand-fold ratio is also the assay problem. An immunoassay antibody raised against the DHEA nucleus cannot perfectly ignore a molecule that differs from it by one sulfate group. Do the arithmetic: if the sulfate is present at 1,000× the analyte, then a cross-reactivity of only 0.1% contributes as much signal as all the free DHEA in the tube. Every unconjugated DHEA immunoassay is fighting that ratio, which is why the reference method involves extraction or chromatography before detection, and why cross-reactivity and interference are treated as the default hypothesis for an odd steroid result rather than the exotic one Ghazal 2022 Haddad 2019.
The honest summary of the method question on this page is therefore not ‘prefer LC-MS/MS’. It is: prefer the sulfate. DHEA-S is the analyte the reference-interval work is done on Bokulić 2023, and its long half-life means one tube integrates the pulses that make free DHEA uninterpretable.
DHEA: what changes the blood, and what only changes the reading
What changes the steroid in your blood — largest first:
- Where you were in an ACTH pulse. Free DHEA is secreted in bursts driven by ACTH and cleared in minutes. Within-day variation exceeds most between-person differences anyone would act on. This is the dominant term and it is not a small one.
- Time of day. The pulse envelope follows the cortisol rhythm, peaking in the early morning and falling through the day.
- Age. Adrenal androgen output rises through adrenarche, peaks in the twenties and declines progressively thereafter; DHEA and its sulfate are the standard illustration of that decline Erceg 2025.
- Oral DHEA supplementation. Large and unpredictable, and distorted by first-pass sulfation — much of an oral dose arrives in the circulation as DHEA-S rather than as DHEA, so the two markers move by different amounts from the same capsule.
- Glucocorticoids and adrenal suppression lower it; a 21-hydroxylase block raises the adrenal androgens as a group Sarafoglou 2023.
What changes only the reading:
- Cross-reactivity with DHEA-sulfate, present at ~1,000× the concentration — the arithmetic above. On a direct immunoassay this is the largest analytical term on the page.
- Biotin on streptavidin platforms, and heterophile antibodies, which produce results that look biologically plausible and are not Ghazal 2022.
- Which platform, since steroid immunoassays are not interchangeable and the reference intervals are derived per analyzer Bokulić 2023.
Reference interval or decision threshold — which kind of number DHEA is
A reference interval, and an unusually wide one — the central 95% of a sampled population, with no outcome attached. There is no concentration of free DHEA that has been shown to predict anything, and no guideline body publishes an optimum.
The width is doing something specific and worth understanding. A reference interval built from single draws on a pulsatile analyte is wide because it contains everybody's peaks and everybody's troughs. It therefore behaves less like a description of health than like a description of sampling luck, and a value inside it excludes very little.
The adrenal-androgen number that does carry population reference data — derived, again, per analyzer — is DHEA-sulfate Bokulić 2023. Where a genuine decision threshold exists in this corner of endocrinology it belongs to a stimulated test or to a biomarker panel in 21-hydroxylase deficiency, not to a random morning DHEA Sarafoglou 2023.
How you would know your DHEA was wrong — and when to redraw
The most useful answer is: don't. Order DHEA-S instead. Its hours-long half-life integrates the pulses that make an unconjugated DHEA a coin toss, and it is the marker with reference data behind it Bokulić 2023.
If DHEA itself is on the form as part of a steroid profile, the retest conditions are: 7–9am, same laboratory, same analyzer, and no DHEA supplement for at least four weeks beforehand.
What would have to change for the second value to mean anything. A pulsatile analyte moving on its own is not evidence — it is the expected behavior of a pulsatile analyte. A real shift in adrenal androgen output should show up in the whole family at once: DHEA-S in the same direction, cortisol reflecting whether the drive is ACTH-wide or androgen-specific, and 17-OH progesterone if the question is an enzyme block Sarafoglou 2023. DHEA alone moving while DHEA-S and cortisol sit still is a sampling artefact until proven otherwise.
What DHEA cannot tell you
It cannot tell you your adrenal status from one draw. That is the whole content of this page. A low morning DHEA is compatible with perfectly normal adrenal function sampled between pulses.
It cannot diagnose ‘adrenal fatigue’. There is no laboratory definition of that condition to test against, so no value can confirm or exclude it. The conditions that do have definitions — adrenal insufficiency, congenital adrenal hyperplasia — are diagnosed on cortisol dynamics, ACTH and 17-OH progesterone, not on DHEA Sarafoglou 2023.
It cannot substitute for DHEA-S, and it cannot be converted into one; the two are related by an enzyme, not by a factor.
The wrong inference readers reliably draw is that a low unconjugated DHEA measures how ‘burnt out’ their adrenals are. What it most often measures is what time the phlebotomist was free.
Sources read for these sections
- Erceg N, et al. The Role of Cortisol and Dehydroepiandrosterone in Obesity, Pain, and Aging. Diseases 2025 · PMID 39997049
- Bokulić A, et al. Androgens in women: Establishing reference intervals for dehydroepiandrostenedione sulphate and androstenedione on the Roche Cobas. Biochemia Medica 2023 · PMID 37324111
- Sarafoglou K, et al. Interpretation of Steroid Biomarkers in 21-Hydroxylase Deficiency and Their Use in Disease Management. Journal of Clinical Endocrinology and Metabolism 2023 · PMID 36950738
- Haddad RA, et al. Interpretation of common endocrine laboratory tests: technical pitfalls, their mechanisms and practical considerations. Clinical Diabetes and Endocrinology 2019 · PMID 31367466
- Ghazal K, et al. Hormone Immunoassay Interference: A 2021 Update. Annals of Laboratory Medicine 2022 · PMID 34374345
Where to start with DHEA
In this order. Start at the supplement and you learn nothing, because you never established the number was real.
You have the range, where it came from and the first two moves. Inside is the rest of the five-pathway protocol — supplements, hormones, peptides — the order to run them in, and what to change when the number will not move.
Get the full protocol — $10/mo →📚 Endocrine Society guidance on adrenal androgen assessment.
🩸 Test your DHEA
Order directly through Marek Diagnostics — no doctor's visit needed, drawn at any Quest location in the US. Code CAMERON applies 10% off automatically.
Order this test — 10% off → Browse all 103 markers →What DHEA is usually tested alongside
One marker is a data point. These panels add the markers that make DHEA interpretable, name why each is on the list, and load the set into your cart at 10% off.
includes this + 7 more markers — Wired-and-tired, crashing mid-afternoon, salt cravings, dizzy on standing, or you've been told you have 'adrenal fatigue'.
includes this + 7 more markers · built for women — Women with a confirmed high testosterone, DHEA-S or free androgen index who want to know where it is coming from — particularly when PCOS has been assumed but the periods, the ultrasound or the pattern do not fit.
includes this + 7 more markers · built for women — Acne along the jawline, chin and neck that flares before your period, persisting or starting in your 20s, 30s or 40s.
What people use DHEA to decide
Nobody orders a test for its own sake. DHEA is on the test list for these pathways — each one links to what the pathway claims, and what its test list is read for before you spend anything on it.
A four-point salivary cortisol curve is worth far more than a single morning serum draw — the pattern is the diagnosis. Low morning and high evening is the wired-and-tired picture, and it responds to adaptogens rather than to stimulants.
The rhythm is the diagnosis, not the level. Worth being blunt: 'adrenal fatigue' is not a recognized condition and the glands rarely fail — but a flattened cortisol curve is real, measurable and treatable.
Both ends of the estradiol range kill libido in men, which is why crushing it with an aromatase inhibitor so often makes things worse. Use the sensitive assay — the standard one is unreliable at male concentrations.
Why your DHEA might be wrong
Most abnormal results are interference, not disease. Check these before you change anything. Each says whether the number is wrong (repeat it), badly timed (redraw it), or real with a cause.
Follows a daily rhythm with a morning peak, so a value drawn at 8am and one drawn at 2pm are not comparable numbers.
Draw between 7 and 9am, and use the same window every time you retest.
Raises it directly and unpredictably — absorption varies widely.
DHEA-S is the more stable marker of adrenal output; unsulfated DHEA swings far more.
What DHEA means in combination
One marker tells you a little; combinations tell you the story. These are the named patterns this one takes part in.
The single most important pairing in adrenal medicine and the reason cortisol alone is close to useless. High ACTH with low cortisol means the gland is failing and the pituitary is compensating — primary adrenal insufficiency. Low or inappropriately normal ACTH means the signal never arrived, which is a pituitary problem with a different workup entirely.
Either way this is a doctor, promptly — untreated adrenal insufficiency can kill in a crisis. Check sodium and potassium on the same CMP: low sodium with high potassium supports the primary pattern.
What to test next
These put DHEA in context — each with its own full breakdown.
Frequently asked questions
180–1250 ng/dL (varies widely with time of day). Ranges vary by laboratory and assay — always compare to the range printed on your own report.
Order DHEA-S instead. Unconjugated DHEA is pulsatile and tracks the cortisol rhythm, so one draw does not represent your status. Adrenal androgen status is assessed with DHEA-sulfate; that is the marker with reference data, and it has its own page here.
Supplementation, PCOS, congenital adrenal hyperplasia, adrenal tumors.
Aging, adrenal insufficiency, chronic stress, corticosteroid use.
You can order DHEA directly through Marek Diagnostics without a doctor's visit — drawn at any Quest Diagnostics location in the US. Code CAMERON applies 10% off automatically.
Where this goes next
This page is the free framework, and it splits by sex. The protocol itself — the dosing, the order to correct things in, the week-by-week schedule and what to retest — is a lesson inside Skool.