DHEA

Start with the thing most pages bury: DHEA is a hormone, not a vitamin. Your adrenal glands produce dehydroepiandrosterone and hold most of it in circulation as its sulfated form, DHEA-S, which acts as a reservoir. Peripheral tissues — skin, fat, bone, gonads, brain — carry the enzymes to draw on that reservoir and convert it downstream into testosterone and into estrogens, in proportions that vary by tissue, by sex, and by person. Swallowing a 25 mg capsule is therefore not topping up a nutrient you are short of. It is adding substrate to a working endocrine system and letting the body decide what to make of it. That difference is also why regulators treat it so unevenly: DHEA is a prescription-only medicine in the UK, Canada, Australia and much of Europe, and sits on US supplement shelves because of a specific legislative carve-out rather than because anyone concluded it was benign.

The popular case for DHEA rests on a curve. DHEA-S peaks in your twenties and declines steadily for the rest of your life, so the reasoning goes that restoring the number restores what the number represents. It is an appealing argument and it has not held up. In young, healthy adults with normal levels — the group most likely to buy it on the strength of that curve — controlled work has not shown gains in strength, lean mass, or body composition, and the fat-loss claims that fill the category have no serious human support behind them. In older adults, where the research actually lives, the trials are small, short, and inconsistent, and the outcomes that do move are modest. DHEA is marketed as an anti-ageing, performance, and body-composition compound. It is not established as any of the three, and we are not going to pretend otherwise.

So why is it in the formulary at all? For the narrow case: an adult already working with a clinician, who has had DHEA-S measured and found low, and for whom that clinician has decided a low daily dose is appropriate. The consultation deliberately never recommends DHEA — no set of answers produces it, by design, because a questionnaire cannot stand in for a blood test on a hormone precursor. It is also prohibited at all times in tested sport, which ends the conversation for a large share of readers before it starts. This page exists to describe DHEA accurately, including the parts that make it unattractive. If you are here deciding whether to begin, the honest next step is a DHEA-S level and a conversation with someone qualified to interpret it.

Also relevant to

Not part of the default protocol for these goals, but worth knowing about if you are building toward one of them.

• Hormones

Benefits, graded honestly

Supports DHEA-S levels that decline with ageEmerging evidence

Oral DHEA reliably raises serum DHEA-S and the downstream androgen and estrogen metabolites, and it does so within weeks. That part is not in dispute. We still grade this emerging, because raising a number is not the same as delivering a benefit — the assumption underneath most DHEA marketing is that because the level falls with age, restoring it restores something youthful, and that step has never been demonstrated. Treat the biochemistry as established and the meaning of it as an open question.

Supports a general sense of wellbeing in older adults with low levelsEmerging evidence

Small, short controlled trials in older adults whose DHEA-S was measured low have reported modest improvements in self-reported wellbeing, mood, and day-to-day energy. Trials of similar size and design have found nothing at all. The literature is inconsistent enough that the honest summary is 'sometimes, in some people, modestly' — and the people it shows up in are consistently the ones who started low. There is no comparable signal in younger adults with normal levels.

Supports bone mineral density in older adultsEmerging evidence

This is probably the most repeatable finding in the DHEA literature, and it is still small. Studies running six months to two years in older adults, more often women, have reported modest gains in measured bone mineral density at the hip and spine against placebo. Modest is the operative word: smaller than what weight-bearing exercise, adequate protein, and correcting vitamin D and calcium status deliver, and those come with none of the endocrine considerations. Do the foundational things first, and do them properly, before this is even a question.

Supports skin hydration and thickness in older adultsEmerging evidence

Skin is rich in the enzymes that convert DHEA locally into androgens and estrogens, so the mechanism is coherent rather than invented. Small trials in older adults have reported improvements in skin hydration, sebum production, and measured thickness. The trials are few, short, and small, and the effect sizes are nowhere near what the phrase 'anti-ageing' implies to a reader. Interesting, not established — and not a reason on its own to take a hormone precursor.

Dosage

When and how to take it

If you and a clinician have decided on it, morning is the default. Your own DHEA output peaks in the early hours and tapers across the day, so a single morning dose roughly tracks the rhythm your body already runs; dosing later is the more common cause of the restlessness and disturbed sleep people report. Take it with food, since DHEA is a fat-soluble steroid and absorption is steadier with a meal than on an empty stomach. Three things not to do: do not stack it with other hormonal products, do not run a second precursor alongside it because a label promised synergy, and do not escalate the dose because week three felt like nothing. The timeline here is not governed by how you feel — DHEA-S responds within weeks, anything downstream over months, and the only sensible read is a follow-up level. This is also not a compound to take indefinitely by default. It is a supervised course with a review date, and if nobody has set that date, that is the missing piece rather than a detail.

Forms

• Micronized oral DHEA — dehydroepiandrosterone milled to a fine particle size for more reliable absorption, and the format most published human research has used. This is what a 25 mg Vitality Stacks capsule is.
• Plain, non-micronized oral DHEA — cheaper, with absorption that varies more between products and between people. With a hormone precursor, unpredictable delivery is not a neutral trade-off.
• 7-keto DHEA — a downstream metabolite the body does not convert into testosterone or estrogen. It is sold as the version without the hormonal considerations, which is true as far as it goes, but it is a different compound with its own thin evidence base rather than a milder DHEA.
• Topical and vaginal preparations — prescription medicines in many countries rather than supplements. They are dosed and monitored by a prescriber and are not a self-directed alternative to the oral form.
• A note on the category itself: independent testing of retail DHEA products has repeatedly turned up capsule contents that do not match the label, in both directions. With a hormone precursor, third-party testing is not a nice-to-have.

Side effects

• Oily skin and acne — across the face, chest, or back. One of the most commonly reported effects, and a plain signal that the androgen side of the conversion is doing something.
• Unwanted hair growth on the face or body in women, and thinning at the scalp. These can be slow to settle after stopping.
• Deepening of the voice in women. Uncommon, a known consequence of androgen exposure, and it may not return to baseline after stopping — which is exactly why it belongs on a short list rather than a long one.
• Irritability, agitation, or a noticeably shorter fuse. Reported often enough to expect it, and more likely toward the upper end of the dose range.
• Difficulty falling asleep or staying asleep, particularly when the dose is taken later in the day.
• Breast tenderness or swelling — in men as well as women, since DHEA converts along the estrogen route too.
• Changes in menstrual cycle timing or flow.
• Shifts in blood lipids, most consistently a fall in HDL cholesterol and reported more often in women. You cannot feel this one, which is the whole argument for bloodwork over self-assessment.

Frequently asked questions

What is DHEA and what does it actually do?

DHEA is a steroid hormone made by the adrenal glands and carried in the blood mainly as DHEA-S, which acts as a circulating reservoir. Tissues around the body draw on that reservoir and convert it into testosterone and into estrogens, in different proportions depending on the tissue, your sex, and your individual enzyme activity. So what DHEA does is supply raw material to your own hormone system. What it does not do is act like a vitamin correcting a dietary gap — that framing is the single most common misunderstanding about this compound.

Is DHEA a steroid or a supplement?

Both descriptions are accurate, and that is the confusing part. Chemically it is an endogenous steroid hormone precursor. Legally, in the United States, it is sold as a dietary supplement because of a specific legislative carve-out, while in the UK, Canada, Australia, and much of Europe it is a prescription-only medicine. The regulatory status varies by country; the biology does not. Treat it as what it is chemically, not as what the shelf it sits on implies.

How much DHEA should an adult take?

Human research clusters at 25–50 mg once daily, and almost all of it enrolled people whose DHEA-S had been measured and found low. A Vitality Stacks capsule provides 25 mg, the lower of those two figures, taken once daily with food in the morning. Whether 25 mg is the right amount for a specific person — or whether any amount is — is a question for the clinician who ordered the blood test, not a decision to make from the range on a page like this one.

Does DHEA raise testosterone?

It raises the precursor pool, and the body converts some of that into testosterone — how much varies considerably between individuals, and in women the proportional rise in androgens tends to be larger. But a measurable change in a lab value is not the same as a felt benefit, and controlled work in young men with normal levels has not shown gains in strength or lean mass. Anyone selling DHEA as a testosterone booster is describing a biochemical step and letting you infer an outcome the research has not delivered.

Is DHEA banned in sports?

Yes. DHEA appears on the World Anti-Doping Agency prohibited list as an anabolic agent and is prohibited at all times, in competition and out of it, with national anti-doping bodies following the same list. That covers far more people than most readers assume — collegiate athletes, masters competitors, tactical roles with testing programmes, and anyone entering a federation-sanctioned event. There is no permitted threshold and no reliable clearance window, so if you are tested at all, this compound is off the table.

Does DHEA work for anti-ageing, energy, or fat loss?

That is how it is sold, and the evidence does not support any of the three. The anti-ageing pitch rests on the observation that DHEA-S declines with age, but restoring a number has never been shown to restore what the number is assumed to represent. Fat-loss claims have no serious human support. Energy and wellbeing results in older adults with measured-low levels are modest and inconsistent, and absent entirely in younger adults with normal levels. If those are your goals, sleep, training, protein intake, and correcting an actual nutrient shortfall will do more, with none of the endocrine considerations attached.

Do I need a blood test before taking DHEA?

Yes, and we would go further: without one there is no sound basis for taking it. A DHEA-S level tells you whether you are correcting a genuine shortfall or adding a hormone precursor to a system already running normally, and those are entirely different decisions with entirely different risk. It is also the only way to judge whether the dose is doing anything, since the meaningful changes happen over months and are not something you can feel week to week. This is a compound to start with a clinician, review with a clinician, and stop when they say so.

Written for adults aged 18 and over. This content is for education only and is not medical advice. Supplements are not intended to diagnose, treat, cure, or prevent any disease. Talk with your clinician before starting any supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition. Supplements for children are a pediatric clinician's decision — keep all supplements out of reach of children.

Our medical advisor is Dr. Garrett Wdowin, NMD, ABAAHP, FAARM, naturopathic doctor. This page has not been medically reviewed.