In a man’s brain, there is a complex chain of signals called the hypothalamic-pituitary- gonadal axis. This chain regulates the testosterone produced in the testes. 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 onwards. YouthBerry’s Libido Max has been clinically proven to boost free Testosterone levels leading to increased sexual libido, muscle mass and energy levels