HGH ihomoni inogadzirwa nemuviri.Iyo yakanyatsogadzirwa uye yakavanzwa nemasero eganda mune anterior pituitary gland iri pazasi pehuropi.HGH inomutsa akawanda metabolic maitiro mumasero.HGH inokanganisa mapuroteni, mafuta, carbohydrate uye mineral metabolism.Basa guru reHGH nderekukurudzira chiropa kuti chibudise Insulin-like Growth Factor-I (IGF-I).