Actually, from all the research I've done, HGH is best for YOUNG people since it makes literally just about EVERYTHING grow (not only muscle tissue, but bone and organ tissue as well). Since the entire body is still in a developmental phase, younger people should be able to avoid the physical deformities associated with HGH use in mature bodybuilders (entire stomach protruding in spite of great abdominal muscle definition, changes in the shape of the skull, etc.). Younger people who take normal testosterone/nandrolone increasing steroids seem to possibly prevent themselves from ever reaching their full physical and hormonal potential.