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It is important to note what this is: a small study of a combination product, not a trial of copper peptides on their own, so it cannot tell you what GHK-Cu by itself does

~2 min Get expert advice 02 Free physician review A board-certified US physician with decades of peptide experience reviews your intake & approves the right therapy for you

PE-22-28 PE-22-28 is a nootropic peptide that could stimulate TREK-1

Copper is an essential trace mineral involved in: Collagen cross-linking Angiogenesis Energy metabolism Immune function Copper enhances GHKs ability to stimulate healing and repair , something non-copper peptides lack