Androstenedione.
Research-backed compound with potential health benefits. It's a prohormone, a step away from testosterone. The body can convert it, but it also readily converts to estrogen, which is where the problems start.
Reviewed March 2026
- Category
- Compound
What Androstenedione is, and what it does.
- Does it work
- This is a steroid pathway intermediate rather than a general wellness ingredient. It is a controlled substance in the United States and banned in sport, so it belongs with a clinician.
- How much to take
- The correct dose is zero. Historically, people took 100-300mg daily before it was banned. Don't do it.
- Time to feel it
- Nothing acute. Oral doses face heavy first-pass metabolism, and what changes shows up as a hormone panel reading within hours to days rather than as a sensation.
- The first dose
- Nothing. You won't feel stronger. Hormonal changes take time to manifest, and they're usually not the ones you want.
- With regular use
- After a few weeks, you risk acne, hair loss, mood swings, and lowered good cholesterol. Men can see breast tissue development (gynecomastia). It's a recipe for hormonal imbalance.
- How well tolerated
- Not safe. It's a Schedule III controlled substance in the U.S. for a reason. The side effect profile is similar to low-dose anabolic steroids.
- How it feels
- Like a bad hormonal experiment. Any potential strength gain is buried under moodiness, acne, and the anxiety of taking an illegal, unregulated substance.
- The overlooked benefit
- Most people meet it as a lab value, not a capsule. Androstenedione is measured on a panel as a readout of how much steroid the adrenal cortex and gonads are producing.
50 to 100mg a day is where Androstenedione works.
Source: King et al. JAMA 1999; prohormone literature
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
Androstenedione is documented in the library; the clinical read is in the queue. Nothing about the strength of the research prints until the read is done.
- Circulating testosterone in healthy menRandomised trial
- Circulating oestrone and oestradiolRandomised trial
- Strength and lean mass alongside resistance trainingRandomised trial
- Blood lipid fractionsRandomised trial
- Adrenal and gonadal steroid output as a measured markerCohort study
Questions people ask about Androstenedione.
- Is Androstenedione a steroid?
- Yes. It's classified as an anabolic steroid precursor and is a Schedule III controlled substance in the US.
- Is it legal to buy?
- No. It was banned for over-the-counter sale in the U.S. in 2004.
- Will it actually increase my testosterone?
- Barely. Studies show a small, temporary bump at best. It's much more effective at increasing your estrogen levels, which is the opposite of what most users want.
- What are the main side effects for men?
- Breast tissue development (gynecomastia), acne, accelerated hair loss, and negative changes to cholesterol.
- Why was it so popular in the 90s?
- Hype and legal loopholes. Mark McGwire's home run chase put it on the map before the science and safety data caught up.
- Are there safe alternatives?
- Yes. Focus on sleep, nutrition, and lifting heavy. Supplements like Creatine, Vitamin D, and Zinc are well tolerated, legal, and actually support healthy hormone levels.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
Dehydroepiandrosterone sits one enzymatic step upstream of androstenedione, and 3-beta-hydroxysteroid dehydrogenase performs the conversion. The two therefore feed the same C19 steroid pool rather than acting independently. This is settled pathway chemistry, not a claim about what either does when taken by a person.
Pregnenolone is the first steroid made from cholesterol and sits two to three enzymatic steps above androstenedione on the delta-5 branch. Anything that raises flux through CYP17A1 moves material toward the same intermediate. The relationship is pathway position, and it says nothing about how much of an oral dose survives first-pass metabolism.
Androstenedione is the substrate aromatase uses to form estrone. Flavones including apigenin have been described as aromatase-modulating in cell-free and cell-culture systems. That is a laboratory observation about an enzyme, not a measured hormonal outcome in people, and the confidence sits accordingly.
Procyanidin-rich extracts have been reported to alter aromatase activity in cultured cells, and aromatase is the enzyme that converts androstenedione to estrone. The finding is mechanistic and non-human. Read it as a laboratory signal rather than evidence of any hormonal change in a person.
Plant sterols share the cyclopentanoperhydrophenanthrene backbone with androstenedione and have been studied for interactions with androgen-handling enzymes. The published work is largely in vitro. Any pairing here is mechanistic interest, not a demonstrated combined effect.
Glycyrrhizin alters how the body interconverts corticosteroids, and the adrenal cortex is also a source of androstenedione. Reports of shifts in circulating androgen precursors during licorice intake exist but are small and inconsistent. The pairing belongs on a page as a plausible interaction to be aware of, not as an established combined effect.
Normal steroid production depends on a working set of zinc-dependent enzymes and on adequate zinc status overall. The link is nutritional adequacy rather than a direct step in the androstenedione pathway. Extra zinc above adequacy has not been shown to move this intermediate.
Boron has been reported to shift measured steroid hormone concentrations in small groups of adults. Those readings are markers, not outcomes, and the trials were short with few participants. The connection is worth naming and not worth relying on.
Nothing specific on file for Androstenedione. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Androstenedione actually does.
Androstenedione is a C19 steroid intermediate of the adrenal cortex and the gonads, formed from cholesterol through pregnenolone by way of CYP17A1 and 3-beta-hydroxysteroid dehydrogenase.
17-beta-hydroxysteroid dehydrogenase interconverts androstenedione and testosterone, so the two sit in a reversible enzymatic equilibrium rather than in a one-way line.
Aromatase (CYP19A1) converts androstenedione to estrone, which makes this intermediate a branch point between the androgen and oestrogen arms of steroid metabolism.
Circulating androstenedione is cleared largely by hepatic reduction and conjugation to glucuronides and sulfates, which are excreted in urine; oral doses face substantial first-pass metabolism.
Where Androstenedione comes from.
It is built in a factory from plant sterols, either by feeding them to bacteria that chew off the long tail or by taking yam-derived diosgenin apart chemically. Neither route starts from an animal. What comes out is a purified crystalline powder.
The same molecule is reached more than one way. Which route a given product used is a manufacturing choice, and the finished compound is the same either way.
Industrial routes start from soy or tall-oil phytosterols (mainly beta-sitosterol and campesterol) or from diosgenin obtained from Dioscorea tubers.
Phytosterol routes use selective microbial side-chain cleavage by Mycobacterium strains, which stops at the C19 ketone. Diosgenin routes use the classical multi-step chemical degradation to a 17-keto steroid instead.
The steroid is partitioned into an organic solvent and the biomass or spent reagents are separated off.
Repeated crystallisation removes related steroid by-products such as androstadienedione and residual sterol.
Dried crystals are milled to a defined particle size and assayed by chromatography against a reference standard.
The forms it comes in.
The essence, in one line each.
- Pooling the available trials, androstenedione supplementation raised circulating estradiol, while no clear change was detected in testosterone, body composition or blood lipid measures.Meta-analysis. Pang et al., 2022 (Hormones). PMID 35841524 ↗
- A single acute dose of androstenedione in older men was followed by a short-lived rise in circulating testosterone rather than a sustained one.Randomised trial. Judge et al., 2016 (The Aging Male). PMID 27558186 ↗
- Pooled hormone measurements after bilateral oophorectomy show the shift in circulating androgen precursors, androstenedione among them, that follows loss of ovarian steroid output.Meta-analysis. Wu et al., 2025 (Medicine). PMID 40797431 ↗
- Acute ketone supplementation lowered measured androgen and glucose concentrations in the enrolled women, a marker-level change over hours rather than a clinical outcome.Randomised trial. Rittig et al., 2025 (European Journal of Endocrinology). PMID 40393075 ↗
- An open-label flaxseed intervention reported changes across a reproductive endocrine panel that includes androstenedione; the design carries no control group.Open-label trial. Najdgholami et al., 2025 (Frontiers in Endocrinology). PMID 40260281 ↗
- Isolated glandular cells were shown to carry the enzymatic machinery to build sex steroids from cholesterol, with androstenedione appearing as an intermediate.In vitro study. An et al., 2026 (Biology). PMID 41972586 ↗
- Short-term rumen-protected folic acid altered one-carbon metabolism and steroidogenesis markers, with androstenedione measured as part of the steroid panel.Animal study. Yang et al., 2025 (Animal Reproduction Science). PMID 40373383 ↗
- A single-patient report in which androstenedione appears within the steroid panel used to work through an unusual endocrine presentation.Case report. Agarwal et al., 2026 (Clinical Case Reports). PMID 42427812 ↗
These are the studies our verdict leans on, chosen from the 2,524 we read for Androstenedione. The full linked list is below.
The studies, linked.
4 sources behind our Androstenedione verdict: peer-reviewed studies and registered clinical trials. Every one links straight to PubMed, the journal, or ClinicalTrials.gov. Read them yourself.
- Clinical trialPolycystic Ovary Syndrome and Urinary Tract Stones: a BMI-Adjusted Analysis in Iraqi WomenClinicalTrials.gov ↗407 participants · Completed
- Clinical trialA Phase IIA Trial Assessing the Tolerability of Ribociclib in Combination With an Aromatase Inhibitor in Patients Aged 70 and Older With Hormone Receptor Positive Metastatic Breast CancerClinicalTrials.gov ↗PHASE2 · 2 participants · Completed
- Clinical trialEvaluation of Serum Adrenal Androgens Among Prepubertal and Pubertal Boys With Autism Spectrum DisorderClinicalTrials.gov ↗100 participants · Unknown
- Clinical trialEarly Follicular Phase Androstenedione Monitoring During Low-dose Step-up Induction of Ovulation in High RespondersClinicalTrials.gov ↗50 participants · Unknown
Evidence surfaced via Semantic Scholar (Allen Institute for AI) and ClinicalTrials.gov. Ranked by study type and citation weight, not cherry-picked.
Problems people have reported.
Read this carefully. These are 126 voluntary, unverified reactions reported to the FDA (openFDA). The number mostly reflects how popular Androstenedione is, not how risky it is. A report is not proof Androstenedione caused anything. It is a signal of what to watch for, nothing more.
Source: openFDA adverse-event reports. Voluntary reporting, not an incidence rate.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.