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AHK-Cu (alanine-histidine-lysine copper) has some published evidence for cosmetic formulation use, but lacks GHK-Cus documented gene expression data, wound healing evidence base, and 50+ year research history
Vegetarians and vegans are at higher risk of deficiency and may need ongoing supplementation alongside or after injectable correction
Kamdi SP, Raval A, Nakhate KT
S2CID 28557054
Allies of Skin Copper Tripeptide & Ectoin Advanced Repair Serum pricing This serum is, by far, the most expensive option of our top picks, but Allies of Skin does offer one of the best subscription discounts among the products in this guide
US$ 20.66
US$ 24.10
US$ 20.60
US$ 28.91
