IGF 1 vs. HGH Which is Better for Growth and Fat Loss? HRT Effects of GH IGF on the Aging Mitochondria The GH IGF 1 axis in obesity: pathophysiology and therapeutic considerations Nature Reviews Endocrinology Copper peptide GHK Cu Wikipedia How GHK Peptide Works Signaling GHK acts as a switch for skin repair: Interacts with adenosine receptors reduces inflammation Activates MAPK ERK, PI3K Akt, TGF pathways Stimulates fibroblasts & keratinocytes boosts collagen, elastin