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Endogenous GHK is found in human plasma, where its concentration declines significantly with age a pattern that has driven sustained interest in GHK-Cu as a research compound

It also improves skin texture, creating a smoother and more even finish

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10.1016/j.jnutbio.2006.12.003 J Nutr Biochem

Originally discovered in human gastric juice, this peptide acts as a foundational signaling molecule for mucosal protection and internal balance (homeostasis)

After injection, withdraw the needle smoothly, apply gentle pressure with cotton wool, and immediately dispose of the needle in a sharps container without recapping