Testosterone is one of the most important hormones in a man's body and it is frequently overlooked when managing a man's health. Testosterone levels begin dropping at a rate of 1% per year beginning in the early 30's and progress to a rate of 1-3% per year by the age of 40. This gradual decline in testosterone leads to a progressive decline in health. Men begin experiencing fatigue, poor sleep, decrease in musle mass, depression, anxiety, a decreased ability to regulate insulin, glucose and fat metabolism, decreased libido, decreased cognition, and increased erectile dysfunction.