Boldenone U 200

(Boldenone Undecylenate 200mg/mL) 10mL vial


Boldenone undecylenate is a prodrug of boldenone. When administered via intramuscular injection, a depot is formed from which boldenone undecylenate is slowly released into the body. Boldenone is a substrate for 5α-reductase and may be converted by this enzyme into 1-testosterone (δ1-dihydrotestosterone, δ1-DHT, dihydroboldenone) in tissues that express it such as the skin, hair follicles, and prostate gland.However, its affinity for this enzyme is said to be extremely low. Boldenone has strong anabolic effects and moderate androgenic effects. It also has low estrogenic activity and, in relation to the fact that it is not 17α-alkylated, has little or no risk of hepatotoxicity.


Boldenone undecylenate, or boldenone 17β-undec-10-enoate, is a synthetic androstane steroid and a derivative of testosterone.[It is the C17β undecylenate (undecenoate) ester of boldenone, which itself is δ1-testosterone, 1-dehydrotestosterone, or androsta-1,4-dien-17β-ol-3-one. Boldenone is the non-17α-alkylated variant of metandienone (17α-methyl-δ1-testosterone). An AAS related to boldenone undecylenate is quinbolone (δ1-testosterone 17β-cyclopentenyl enol ether).