Testosterone cypionate is a slow-acting injectable ester of the primary male androgen testosterone. Testosterone is also the principle anabolic hormone in men, and is the Jasis of comparison by which all other anabolic/androgenic steroids are judged. As with all testosterone injectables, testosterone cypionate is highly favored by athletes for its ability to promote strong ncreases in muscle mass and strength. It is interesting to lote that while a large number of other steroidal compounds have been made available since testosterone njectables, they are still considered to be the dominant Julking agents among bodybuilders. There is little argument that these are among the most powerful mass irugs available, testosterone cypionate included.