Testosterone is widely known as the male hormone, or as the male sex hormone, and given its role in the development of quintessentially male attributes such as facial hair, deeper voice and muscle strength during puberty that is a fair description. It is essential for the production of sperm. Testosterone levels peak in early adulthood and decline thereafter. The drop is around 1% a year among men in their forties. A number of issues of male ageing are linked to low level of free testosterone. These incluse anxiety, stress, irritability, sleep challenges, loss of muscle mass and loss of sexual function.