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Trenbolone acetate was distributed in the 1980s by the pharmaceutical companies Hoescht and Roussel (USA and France respectively). Interestingly, both companies gave very similar names to this steroid – Finajet for the American version, and Finaject for the European one. Finaject was mainly used on cattle to improve appetite and increase muscle mass. Although the FDA (US Food and Drug Administration) never approved trenbolone for human consumption, it quickly gained popularity among bodybuilders. This was due to its amazing androgenic activity and the absence of estrogenic manifestations.