Ryse Test Support 120CapsTestosterone is a steroid hormone that helps you increase lean muscle mass and bone density. Beyond simply helping you have a nice body, its also crucial for good health! Low levels of testosterone, in both men and women, can lead to a number of serious health conditions, including increased risk of depression, low sex drive, obesity, and osteoporosis. Testosterone acts on muscle cells by binding to a specific receptor protein, the androgen receptor.