Because just as you wouldnt put low-grade fuel in a precision engine, you sure wouldnt put anything less than the purest peptides in your body
The combination of copper peptides and retinol can cause irritation in sensitive individuals, though many people tolerate both when used at separate times
Baez S, Segura-Aguilar J, Widersten M, Johansson AS, Mannervik B
Ghasemi A, Amjadi F, Masoumeh Ghazi Mirsaeed S, et al
Its established molecular architecture and documented metal-binding properties have made it a valuable reference compound for studies examining ligand-metal interactions, metallopeptide pharmacology, structure-function relationships, and copper-dependent regulatory mechanisms.