Does TestoGen Work? Gone are the days when women are said to be the only ones affected by menopause. Today, men from all over the globe also suffer from the effects of these hormonal shifts that have led to a decline in their overall health and quality of life. In recent decades, medical experts have discovered that the body’s ability to produce significant amounts of hormones such as testosterone and the human growth hormone (responsible for one’s youthful vitality) declines as one continues to age. Beginning in the mid-20s, one’s hormonal levels begin to dip as the various glands (located in the brain, thyroid, thymus, pancreas and testes) that are responsible for producing these key hormones start to slow down.