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Molar calculations differ, the copper complex is blue while the free peptide is colourless, and the equilibrium between them shifts with the free copper, competing chelators, phosphate content and reducing agents present in the medium
Its formula is very nice: 0.2% retinal (which is a vitamin A derivative slightly less powerful than tretinoin but still quite effective) formulated in a very gentle emulsion to minimize irritation as much as possible
I highly recommend this product and the company
Store your reconstituted peptide correctly, use appropriate syringes, and maintain sterile technique throughout the process