Boldenone is an anabolic androgenic steroid and synthetic derivative of testosterone that was originally developed for veterinary use but has since become one of the more common performance-enhancing drugs that athletes test positive for in sport.

Is boldenone the same as testosterone?

Boldenone (BOL) is an anabolic steroid that differs from testosterone only by one double bond at the 1- position (Stolker et al. 2007) (Figure 1). It is used mainly as undecylenate ester by bodybuilders and is administered illegally to racing horses.

Does boldenone increase strength?

There are better anabolic steroids out there for bulking up, but boldenone is still effective at building lean muscle mass. That is useful for baseball players because it introduces the possibility of gaining strength without looking like the Hulk, which would obviously raise suspicion.