Testosterone Cypionate is a synthetic version of the naturally produced testosterone hormone. This hormone is responsible for many different physical and mental characteristics in males. It promotes sex drive, fat loss, helps with gaining and maintaining lean muscle mass, increases bone density, and may even protect against heart disease. Whether it is naturally produced or through the use of Testosterone Cypionate, these traits do not change. All other steroids are actually the testosterone molecule that has been altered to change the properties of the hormone. Testosterone Cypionate carries a rating of 100 when measuring its anabolic/androgenic structure and this rating is used to measure all other steroids.