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Because copper complexes are photosensitive and hygroscopic (moisture-absorbing), vials must be: Shielded from light (both UV and visible light accelerate copper reduction) Tightly sealed to prevent air and moisture exposure Stored in dark, airtight containers Protected from repeated temperature fluctuations Reconstituted Solutions Once reconstituted with bacteriostatic water, the solution should appear clear and deep blue

The Reconstitution Guide provides the full visual walkthrough

doi:10.1155/2015/648108 Pickart L, Margolina A

How Copper Peptides Benefit Acne Prone Skin Copper peptides work on acne-affected skin through several mechanisms