PMID: 26236730 Published Research Highlights Discovery 1973 Tripeptide Identified in Human Serum Pickart and Thaler first identified the GHK sequence in human plasma, discovering a tripeptide that prolonged survival of normal liver cells and stimulated growth in cell culture models
Walls AC, Fiala B, Schfer A, Wrenn S, Pham MN, Murphy M, et al
Sermorelin may support sleep quality in some patients because growth hormone release is closely tied to deep sleep and recovery
Bodybuilders and athletes have explored IGF-1 DES for "targeted" muscle development in lagging body parts, though such applications raise ethical and safety questions
Beyond 3 g/day, additional benefits are marginal and the risk of digestive side effects increases