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ghk-cu benefits skin healing anti-aging Revitalize Your Skin: The of Copper Peptide for Youthful Glow ghk-cu benefits peptide Amazon.com: GHK-Cu
Description
PMC 3485949

They might do blood tests showing improvement (e.g., better red blood cell indices once B/B levels normalize)

doi: 10.1002/cam4.4236 183 HoyekCZheng-linBBauernfeindJJAl-ahmadOH

It enters circulation and activates the same gene expression cascades throughout the body affecting collagen synthesis in skin, wound healing in connective tissue, and potentially neuroprotection in the nervous system