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Its commonly found in the body

How Copper Peptide Ghk Cu Powder Enhances Skin Barrier Function The skin barrier represents the outermost defensive layer that protects against environmental aggressors, prevents excessive water loss, and maintains optimal hydration levels
Arch Orthop Trauma Surg [Internet]

Research has explored its activity in GH axis signaling, pituitary function, and endocrine pathway regulation in controlled laboratory environments
