Reading Time: 7 minutes Hormone Replacement TherapyHGH SecretagogueHGH Secretagogues and GH-RHHGH Secretagogues are hormones, peptides, or other molecules that stimulate Human Growth Hormone production by the Anterior Pituitary Gland. The hormones that stimulate HGH Production most directly are Ghrelin and Growth Hormone-Releasing Hormone.Functionally-Identical and …