ghk-cu stimulates collagen synthesis might be trending, but it's not new. Before you inject yourself with this viral peptide, consider this. This copper peptide has been studied for years in skin repair and signalling GHK-Cu Peptides Before and After:

No human dose is established

Cold chain

[4] [7] Its identity in the literature is a single, well-characterized molecule with a defined approval history

GHK-Cu stimulates collagen I, III, and elastin synthesis in fibroblasts Promotes decorin and glycosaminoglycan production for matrix integrity Attracts immune cells and promotes wound debridement and repair GHK-Cu may prevent oxidative stress in skin by regulating copper and modifying expression of numerous antioxidant genes2012Gene Expression Gene expression analysis reveals GHK-Cu upregulates antioxidant genes and downregulates pro-inflammatory genes, suggesting a protective role against oxidative stress and UV damage in skin

Personal model-assisted identification of NAD(+) and glutathione metabolism as [PMID: 28254760] Laboratory literature summary: Personal model-assisted identification of NAD(+) and glutathione metabolism as intervention target in NAFLD