 These pellets aimed to increase muscle mass and lean tissue of cattle prior to slaughter to increase the profitability of livestock when measured in total pounds of meat sold.The drug appears to have been an early development project of Roussel Uclaf, a French pharmaceutical company, and by the early 1970s, it was being sold as an injectable.Despite trenbolone acetate's official classification as a veterinary AAS, it is considered to be one of the most effective AAS used for physique- and performance-enhancing purposes in humans, particularly in bodybuilding.