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ghk-cu benefits skin hair wound healing Perfection Copper Peptides Powder for Face 99.7% Pure 1 Gram GHK-Cu Copper Peptide Supplement, Anti-Aging
Description
Adv Nutr 9(4):511s518s Long AN et al (2012) Vitamin B12 deficiency associated with concomitant metformin and proton pump inhibitor use

They're signaling molecules that encourage repair and barrier support, not surface exfoliants

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Am Surg 63:266269 Golan J, Mitelman S, Baruchin A, Ben-Hur N (1980) Vitamin A and corticosteroid interaction in wound healing in rats