All Natural Testosterone Booster Clinically Proven to: Increase Sex Drive & Libido Increase Strength & Stamina Increase Energy & Vitality In a man's brain, there is a complex chain of signals called the hypothalamic-pituitary-gonadal axis. The testosterone produced in the testes is regulated by this chain. At the onset of puberty, there is a rapid increase in the production of testosterone. But just as rapidly as it increases at puberty, testosterone production begins to slow from the age of 30 onward. High T has been clinically proven to boost free testosterone levels leading to increased sexual libido, muscle mass and energy levels.