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GHK-Cu influences follicle cycling through multiple mechanisms including stimulation of VEGF and hepatocyte growth factor (HGF) secretion from hair follicle cells, with research demonstrating that advanced delivery formulations achieve ~3-fold enhancement of GHK-Cu penetration while retaining biological function and stimulating dermal papilla cells at the base of follicles

Fertil Steril (1992) 57(2):40916

Peptides from fish scale gelatin and egg whites have proved that smaller peptides (400600 Da) show higher copper ion chelating activity, highlighting the importance of molecular weights in peptide activity (Yap and Gan, 2020

Similarly, platycodin and Fer-1 mitigate TEC injury and suppress TGF-1-driven fibrogenesis in UUO (191)