Testosterone Therapy Testosterone is a hormone produced in the testes of men. Testosterone is responsible for the development of male characteristics such as body and facial hair, muscle growth and strength, and a deep voice. Normal levels of testosterone also influence the production of sperm and promote sex drive. Though testosterone is generally thought of as an exclusively male hormone, it is not unique to males. Testosterone is also produced in the ovaries and adrenal glands in women. Testosterone production starts to decline in both men and women as we age. In men, lower testosterone levels affect physical, sexual, and cognitive functions. Testosterone levels decline gradually over the years but, because it happens slowly, most men accept the symptoms as a by-product of aging Consequently, men who receive testosterone therapy report that they feel energized, stronger and healthier. They say that it makes them feel as they did when they were much younger. Testosterone therapy can stop and reverse the physical decline that robs men of their energy, strength and libido. Testosterone can restore muscle tone and improve stamina. Testosterone can restore healthy sexual excitement and desire, which in turn, results in an improvement in mood and overall well-being. Restoring testosterone to youthful levels can reverse the affects of aging. Men automatically assume that as they age, their sexual capacity will diminish. There is no need to accept this as fact. We should be able to live our life with the same excitement and enthusiasm we enjoyed during our youth.