Anabolic steroidAndrogenProhormoneOralNon-methylatedDHT precursor

Epiandrosterone

Also known as Epi-Andro · 3β-hydroxy-5α-androstan-17-one · Isoandrosterone

Written by enwyReviewed 4 Aug 20262 sources0 comments

Epiandrosterone (3β-hydroxy-5α-androstan-17-one) is a naturally occurring DHEA metabolite and non-methylated prohormone to dihydrotestosterone (DHT). Marketed for 'dry, hard' physique effects, it is one of the milder prohormones with low hepatotoxicity, but efficacy rests almost entirely on anecdote.

01 Overview

Epiandrosterone is an endogenous steroid found in urine and a downstream metabolite of DHEA. As a supplement it is a non-methylated prohormone that converts through 3α-androstanediol to dihydrotestosterone, a potent non-aromatising androgen. Because the end product is DHT, users report increased hardness, aggression, and libido rather than mass, and no estrogenic side effects.

Unlike 17-alpha-alkylated designer steroids it is not orally methylated, so hepatotoxicity is comparatively low, and it was often stacked as a 'base' in prohormone products. There are essentially no controlled human efficacy trials; the compound is characterised mostly through metabolism and doping-control literature. Its legal status varies — it has been marketed as a dietary ingredient in some markets while being treated as a controlled prohormone in others.

02 Mechanism

Converts via 3α-HSD and 17β-HSD pathways to dihydrotestosterone, a high-affinity, non-aromatising androgen receptor agonist.

03 Dosing

Tier	Dose	Route	Notes
Common (marketed)	200–600 mg/day	Oral	Labelled supplement dosing; often run at the higher end due to inefficient conversion.

Ester comparison

Ester	Half-life	Injection freq.	Testosterone by mass

04 Effects

Effect	Magnitude	Evidence
Increased hardness/drynessReported 'dry, hard' look attributed to non-aromatising DHT end product.	cosmetic	Anecdotal
Raised libido and aggressionDHT-driven increase in drive and assertiveness commonly reported.	variable	Anecdotal

05 Side effects

Effect	Severity	Frequency	Evidence	Countermeasures
Mild HPTA suppressionSome testosterone suppression, generally milder than methylated prohormones.	Mild	Common	Anecdotal
DHT-related hair/prostate effectsAccelerated scalp hair shedding or prostate effects possible in predisposed users.	Mild	Uncommon	Anecdotal

06 Legal status

United Kingdom

Class C

Falls under anabolic steroid provisions. · as of Jan 2026

United States

Grey-market prohormone

Marketed as a dietary ingredient by some vendors; treated as a controlled prohormone analogue by others. · as of Jan 2026

07 References

Epiandrosterone metabolism and androgen conversionPubMed

Prohormones and DHT precursors in sportDrug Testing and Analysis

08 Discussion0 comments

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This page is reference information, not medical advice. Doses and protocols are documented as they appear in the clinical literature and in practice — describing them is not a recommendation to use them. Countermeasures listed here are not a substitute for a physician. Legal status varies by jurisdiction and changes.