Stenbolone Propionate
The propionate ester of stenbolone (2-methyl-DHB), a mild non-aromatising injectable DHT-derivative. Historically a rare veterinary/human anabolic; the propionate ester gives a short-acting depot. Dry, low-estrogen gains with modest potency.
01 Overview
Stenbolone is 2-methyl-1-dehydro-DHT, a mild non-aromatising anabolic in the same structural neighbourhood as methenolone (Primobolan). The propionate ester here provides a short-acting injectable depot, distinct from the acetate form catalogued separately.
Human data are sparse and largely historical. Being 5α-based and non-aromatising, it gives dry, lean gains with no estrogenic side effects and comparatively mild androgenicity, making it a "cosmetic"/lean-cycle steroid rather than a mass-builder. Its low potency means larger or more frequent doses for a modest effect.
02 Mechanism
Androgen receptor agonist; the 2-methyl and Δ1 features plus 5α saturation prevent aromatisation, so effects are non-estrogenic. The propionate ester is cleaved to release free stenbolone over a few days.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Anecdotal | 200–400 mg/wk | IM | Short ester implies frequent (e.g. every other day) injections; anecdotal ranges. |
Ester comparison
| Ester | Half-life | Injection freq. | Testosterone by mass |
|---|
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| Dry lean gainsNon-aromatising lean tissue gains with minimal water retention, similar to Primobolan. | Modest | Anecdotal | |
| Low estrogenic burdenCannot aromatise, so no estrogen-driven bloat or gynecomastia. | Non-aromatising | Preclinical |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Injection-site reactionsFrequent injections from the short ester can cause soreness and irritation. | Mild | Common | Anecdotal | |
| HPTA suppressionSuppresses endogenous testosterone as expected for an injectable AAS. | Moderate | Very common | Preclinical |