The functions of Growth Hormone Secretagogue Receptor (GHS - R) were formerly assessed by studies carried out with synthetic peptidyl agonists. (thno.org)
Growth hormone secretagogue receptor, or ghrelin receptor, is a G protein - coupled receptor that binds ghrelin [1] and plays a role in energy homeostasis and regulation of body weight. (factsonhgh.com)
All the studies done on HGH secretagogues such as L - lysine, L - arginine, L - ornithine, L - glycine and L - glutamine say that they do work, they don't work or that they might work and even with the studies that show that they do increase HGH you'd have to take very large amounts which caused nausea & diarrhea in some test subjects. (nowloss.com)