Anabolic steroidAndrogenInjectableAnabolic steroidDihydrotestosterone derivative

Stenbolone Acetate

Also known as Anatrofin · Stenbolone acetate · Anabolicum

Written by enwyReviewed 15 Jul 20262 sources0 comments

A rare injectable derivative of dihydrotestosterone (2-methyl-1-dehydro-DHT) with an acetate ester, briefly marketed as Anatrofin. It is a moderately anabolic, non-aromatising DHT-class steroid conceptually similar to a boldenone-flavoured masteron, giving dry, lean effects. It saw little clinical use and has essentially no modern human data.

01 Overview

Stenbolone is 2-methyl-5-alpha-androst-1-en-17-beta-ol-3-one, a DHT derivative bearing a 1,2 double bond and a 2-methyl group. The short acetate ester requires frequent injection. Being 5-alpha reduced already and lacking the structure for aromatisation, it produces no oestrogen and no progestogenic activity, giving a dry, hardening profile.

It was produced only briefly (as Anatrofin/Stenbolone) and never widely, so its evidence base is almost entirely historical and anecdotal. It is generally described as milder and less androgenic than closely related compounds, used for lean tissue and conditioning rather than bulk.

02 Mechanism

Androgen-receptor agonist of the DHT class; the 2-methyl group and 1,2 double bond preserve activity while it cannot aromatise, giving non-oestrogenic, dry anabolic effects.

03 Dosing

Tier	Dose	Route	Notes
Estimated common	200–300 mg/wk	IM	Short ester; frequent injections. Inferred range.
Estimated heavy	350–450 mg/wk	IM	Sparse data; higher androgenic load.

Ester comparison

Ester	Half-life	Injection freq.	Testosterone by mass

04 Effects

Effect	Magnitude	Evidence
Lean, dry muscle effectDry, hardening lean effect typical of non-aromatising DHT derivatives; no controlled data.		Anecdotal
No oestrogenic activityCannot aromatise, avoiding oestrogenic side effects.		Preclinical

05 Side effects

Effect	Severity	Frequency	Evidence	Countermeasures
Androgenic effectsAcne, oily skin and possible accelerated hair loss in predisposed users, as with DHT-class steroids.	Mild	Common	Anecdotal
HPTA suppressionSuppresses endogenous testosterone and gonadotropins.	Moderate	Common	Observational

06 Legal status

United Kingdom

Class C controlled drug

as of Jan 2026

United States

Schedule III controlled substance

Anabolic steroid; no approved US product. · as of Jan 2026

07 References

Stenbolone: chemistry and anabolic characterisationSteroid pharmacology literature

WADA Prohibited List - anabolic agentsWorld Anti-Doping Agency

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.