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Experts will usually tell you to avoid using your copper peptide serum at the same time as vitamin C, retinoids and strong acids, so best practice is usually to use separate your actives out into AM and PM routines to minimise adverse reactions
Medvidovic-Grubisic et al., 2017
Glutathione c to thnh t phc hp tripeptit vi ba acid amin: cysteine, axit glutamic v glycine
Glutathione is a natural antioxidant produced by the liver and found throughout the human body
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