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You wont go back to your original skin colour even if you stop taking these supplements, however, there is a tendency for you to be tan or darken your skin if you expose yourself to sunlight and other harsh elements

This isn't just about mixing solutions

Because Copper Peptides are delicate, they can lose their efficacy if "chelated" (broken down) by highly acidic ingredients

Vieira P, Danchin EGJ, Neveu C, Crozat C, Jaubert S, Hussey RS, et al

Adding to doctors' worries are concerns about purity and dosing, because users typically buy from websites selling unregulated Chinese product some of which comes from plants that previously produced the deadly opioid fentanyl

Chem Res Toxicol 22:10509 Jones DP, Park Y, Gletsu-Miller N, Liang Y, Yu T, Accardi CJ, Ziegler TR (2011) Dietary sulfur amino acid effects on fasting plasma cysteine/cystine redox potential in humans