UV exposure, pollution, smoking, and hormonal fluctuations can all contribute to collagen loss
Abdellatif, M., Bugger, H., Kroemer, G
Emerging research suggests that GHK-Cu may delay premature greying by reducing oxidative stress in follicular cells, though more evidence is needed
They also differ chemically, which matters at the bench: 5-Amino-1MQ is a permanently charged quaternary quinolinium salt, so molar calculations, solubility and analytical identity follow small-molecule rather than nucleotide or peptide conventions
Lenton KJ, San AT, Therriault H, Cantin AM, Payette H, Wagner JR
Unraveling the central proopiomelanocortin neural circuits