Epiandrosterone
Also known as: Epiandro, 3β-Androsterone, 3β-Hydroxy-5α-androstan-17-one, 5α-Androstan-3β-ol-17-one, Isoandrosterone
Lower numbers = closer to natural. Higher numbers = more enhanced.
Why this rating?
A mild DHT-pathway prohormone sold as a dietary supplement. Wikipedia describes epiandrosterone as a steroid hormone with WEAK androgenic activity, a metabolite of testosterone and DHT, and a naturally 5α-reduced (saturated A-ring) androstane. It is marketed as a non-aromatizing "dry"/hardening prohormone that sits on the DHT side of metabolism. Because its intrinsic androgenic activity is weak and conversion from an oral precursor is inefficient, its effects are modest and cosmetic rather than mass-driving, but it is still a real androgen precursor that can suppress the axis. Rated 4 as a mild prohormone below the stronger nandrolone/testosterone precursors.
Overview
A naturally occurring 5α-reduced androstane steroid (3β-hydroxy-5α-androstan-17-one) sold as an oral "prohormone." Wikipedia describes it as a metabolite of testosterone and DHT with weak androgenic activity, produced from the adrenal hormone DHEA by the enzyme 5α-reductase. Because it is already 5α-reduced (saturated A-ring) it sits on the DHT side of steroid metabolism, which is why it is marketed as a non-aromatizing, "dry"/hardening compound rather than a mass builder.
Purpose & Use Cases
Cosmetic Hardening / "Dry" Look
Used as a finisher to add hardness and dryness without estrogenic bloat, the community role of a non-aromatizing DHT-pathway compound (analogous to how DHT-derived steroids are used).
Non-Aromatizing Prohormone
Chosen specifically because a 5α-reduced steroid cannot aromatize, so it does not add estrogen or water.
Mild Recomp / Strength
Sought for modest strength and body-composition effects; realistically mild given weak intrinsic androgenic activity and inefficient oral conversion.
Benefits
- Non-aromatizing (5α-reduced saturated A-ring cannot be aromatized to estrogen), no estrogenic water retention
- "Dry"/hardening cosmetic feel associated with DHT-pathway compounds
- Base compound is not 17α-alkylated, so hepatic strain is lower than methylated orals
- Milder side-effect profile than stronger prohormones
Good to Know
Why it is "non-aromatizing", the saturated A-ring
Epiandrosterone is 5α-androstan-3β-ol-17-one: its A-ring is fully reduced/saturated, the same structural feature that makes DHT non-aromatizable. Aromatase cannot act on it, so unlike testosterone-type prohormones it adds no estrogen and no water, hence the "dry"/hardening reputation.
A DHT-pathway prohormone, so finasteride is useless for it
It sits on the 5α-reduced (DHT) branch of steroid metabolism. That means its androgenic hair/skin effects cannot be blocked with finasteride/dutasteride. There is no testosterone→DHT conversion left to inhibit, just like the DHT-derived steroids (masteron, winstrol, proviron).
Mild by design: a finisher, not a bulker
Its intrinsic androgenic activity is weak and oral conversion is inefficient, so it is used for a cosmetic dry/hardening effect when already lean, not for mass. It is still a real androgen precursor that can suppress the axis, so it is not "just a supplement."
Dosage Guidelines
| Experience Level | Dosage Range |
|---|---|
| Beginner | 200 – 250 mg/day |
| Intermediate | 250 – 400 mg/day |
| Advanced | 400 – 500 mg/day |
These are product-label / community-forum figures, NOT clinically validated doses, no controlled human dosing data exists. Community sources (bodybuilding review sites, the NIH-affiliated NCATS Inxight Drugs database) converge on roughly 250-500mg/day as the typical range, with multiple sources explicitly cautioning that pushing past ~500mg/day meaningfully raises androgenic side-effect risk without a clear added benefit. Treat 500mg/day as a practical ceiling rather than a floor for "advanced" use. Oral conversion of the precursor is inefficient, so a large fraction of the label dose never becomes active androgen. Effects are best appreciated when already lean.
Not well characterised for supplemental use; no controlled human pharmacokinetic data exist for the oral precursor.
Side Effects
DHT-Type Androgenic Effects (Hair / Skin)
commonAs a DHT-pathway compound it can drive oily skin, acne, prostate enlargement (benign prostatic hyperplasia) and accelerate scalp hair loss in predisposed men, though its own androgenic activity is weak.
Avoid if hair loss is a concern. Note finasteride does NOT help a compound already on the 5α-reduced side.
Natural Testosterone Suppression
commonAs an exogenous androgen precursor it can suppress the HPTA, more so at higher doses and longer runs.
Keep cycles short; a mild SERM PCT is used after prohormone cycles; confirm recovery with bloodwork.
Lipid Strain
commonDHT-pathway/non-aromatizing androgens tend to depress HDL cholesterol.
Lipid panel before/during; omega-3 and citrus bergamot; cardio.
Product Quality / Mislabelling
commonGrey-market prohormone products vary widely in purity and dose accuracy.
Third-party testing where possible.
General Mitigation Strategies
Monitor lipids (DHT-pathway compounds tend to lower HDL) and watch for androgenic hair/skin effects, to which finasteride does NOT apply (the compound is already 5α-reduced). Keep cycles short. A mild SERM PCT is typical after a prohormone cycle; confirm HPTA recovery with bloodwork. Because it does not aromatize, estrogenic side effects and water retention are not the concern here.
Post Cycle Therapy (PCT)
Milder than the nandrolone/testosterone-type prohormones, but as a suppressive androgen precursor it warrants a mild SERM PCT (e.g. tamoxifen or low-dose clomiphene) after longer/higher cycles. Confirm recovery with bloodwork. No AI is needed since it does not aromatize.
How It Works
Epiandrosterone is a 5α-reduced androstane steroid. Wikipedia notes it is naturally produced by 5α-reductase from DHEA and can interconvert with androstanediol (via 17β-hydroxysteroid dehydrogenase) and androstanedione (via 3β-hydroxysteroid dehydrogenase), the 5α-reduced (DHT) branch of steroid metabolism. Because the A-ring is fully saturated (the same structural feature that makes DHT non-aromatizable), it cannot be converted to estrogen by aromatase, so it produces no estrogenic water retention. Its own androgen-receptor activity is described as weak; the "prohormone" rationale is that it feeds the 5α-reduced/DHT metabolic pool, giving DHT-type androgenic (dry, hardening) effects rather than estrogenic ones.
Hormonal & Androgenic Profile
Wikipedia describes epiandrosterone itself as having WEAK androgenic activity; it is a precursor feeding the 5α-reduced/DHT pool rather than a potent anabolic in its own right, so no reliable anabolic:androgenic ratio is established for it.
Does not aromatize, a fully 5α-reduced (saturated A-ring) androstane cannot be converted to estrogen by aromatase (the same reason DHT is non-aromatizable). No AI is needed for epiandrosterone itself.
Already on the 5α-reduced (DHT) side of metabolism, so finasteride/dutasteride do nothing for its androgenic hair/skin effects. There is no testosterone-to-DHT step left to block, exactly as with DHT-derived steroids like masteron.
Non-aromatizing DHT-pathway compounds characteristically suppress HDL cholesterol; no estrogenic water retention. Effect is milder than strong DHT-derived steroids but monitor lipids.
Fundamentals
Reference on the practices relevant to Epiandrosterone: how they are done and where they go wrong. Not a recommendation to use it.
Legal Status
Sold as a "prohormone" dietary supplement, but its legal status is contested, US anabolic-steroid legislation (Anabolic Steroid Control Act 2004, Designer Anabolic Steroid Control Act 2014) broadly targets prohormones and designer steroids.
Legal status varies by country and changes over time. This is a general summary, not legal advice.
WADA Status
Prohormones and exogenous androgen precursors are prohibited at all times under S1. Epiandrosterone and its metabolites are anabolic-androgenic steroids for anti-doping purposes and are detectable on the steroid profile.