Equipoise is the trade name of Boldenone Undecylenate anabolic steroid (derivative of Testosterone). The substance has a strong anabolic and moderately androgenic activity. Despite the fact that the drug was initially used in veterinary medicine, many athletes use Equipoise in certain sports. At first, Equipoise was created as a veterinary injectable steroid for horses and cattle. It was used to improve appetite and weight gain in animals.