Stenbolone Acetate
2-methyl-5α-dihydrotestosterone derivative (injectable). Mildly anabolic with low androgenic activity and no aromatization. Produces lean, dry gains similar to Primobolan. Historically marketed in Spain (Anatrofin) and Italy. Now extremely rare but still discussed in harm-reduction circles for its clean side-effect profile.
Mechanism of Action
DHT-derived with 2-methyl modification enhancing AR binding. Cannot aromatize. 5α-reduced structure means no further metabolism to more potent androgen. Acetate ester gives short half-life requiring frequent injections. Very limited modern pharmacokinetic data.
Typical Dosing
⚠ Warning Flags
- •Extremely rare — nearly all product is counterfeit
- •Requires every-other-day injection (short half-life)
Effect Profile
Side Effect Profile
Research Studies
Pharmacology of anabolic steroids
Kicman AT. · 2008
Review documents stenbolone's pharmacological classification as a mild DHT-derivative injectable with favorable anabolic:androgenic ratio; notes its obsolescence in clinical medicine despite an acceptable safety profile.