Human Growth Hormone one of several key hormones that are prevalent in one's youth starts to decrease as an individual ages. Responsible for the majority of an individual's growth as a child HGH also has been known to increase height and muscle mass as well as bone density and several other vital components to a youth's aging process.
  

http://jackedmuscleextremeadvice.com/force-fit-xl/

Human Growth Hormone one of several key hormones that are prevalent in one's youth starts to decrease as an individual ages. Responsible for the majority of an individual's growth as a child HGH also has been known to increase height and muscle mass as well as bone density and several other vital components to a youth's aging process.
  

http://jackedmuscleextremeadvice.com/force-fit-xl/