Maxx Vital Strong No2 She is born, experience puberty which includes teen years, peaks testosterone production by age twenty, then slowly declines in bone and muscle mass, as well as testosterone levels, through out his life. By age 50, some body functions may suffer as requires at least begins to break down, and through 75 or 80, the typical male is disapated. It's the cycle of living.http://t-rexmuscleadvice.com/maxx-vital-strong-no2/