Bull Shark Testosterone is a steroid made from the testicles of Chilean bull sharks. Brucie Kibbutz is a known user of bull shark testosterone, and has even made a company selling it as of 2013. It is mentioned several times throughout the HD Universe, and has even become a usable item in Grand Theft Auto Online. The effects of Bull Shark Testosterone last only 60 seconds before they wear off. A countdown timer is displayed in the lower right side of the screen after the player picks up the package.