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[1] It binds copper ions and hands them to copper-using enzymes needed for collagen cross-linking (lysyl oxidase) and antioxidant defense (SOD)

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2017 Cell study used 5 mg/kg intraperitoneal injection three times per week in aged mice, with treatment periods of several weeks the three-times-weekly dosing suggests the peptide maintains sufficient functional concentrations for at least 48-72 hours per dose (PMID: 28340339)

The 5mg vial is the standard research format for several reasons

Environ Health Perspect (1994) 102 Suppl 10:1738

Researchers evaluating a research peptide supplier typically look at three things: documented purity, batch traceability, and consistency across orders