The pituitary can kick in at any time. But once the plates at the end of the bones seal growth is pretty much done. One of the kids i went to school with 50 years ago was very short and he got dr. approved HGH is he could grow and he added a few inches but he is still a few inches short of average. .Do you think Dennis Rodman took HGH? He had a major growth spurt I believe well after 18 which is bizarre.
In high school people thought I juiced but all I did was lift and eat and get strong. Its different in a lot of high schools. The extra effort can really separate you. As you move up to college most have put in that extra effort as well.
