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The Science-Backed Peptide for Wrinkles, Firmness & Skin Healing GHK-Cu, also known as glycyl-L-histidyl-L-lysine copper, is a naturally occurring copper peptide found in human blood plasma
If well tolerated, many people increase to twice-daily use as part of their morning or night routine
All randomized participants received at least one dose of the study drug and were included in both the full and safety analysis populations [1]
Neural Regeneration Research, 17 (3), 482
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