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doi: 10.1016/j.cyto.2018.09.008 181 NtougkosEChouvardasPRoumeliotiFOspeltCFrank-BertonceljMFilerAet al

However, not enough research has been done to ascertain the efficacy and safety of glutathione whitening

GHK-Cu is a naturally occurring tripeptide composed of three amino acids glycine, histidine and lysine bound to a copper ion (Cu)

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2.1 Pharmacokinetics & Safety Benzyl alcohol has been shown to effectively inhibit microbial growth in multi-use systems, extending the usable life of peptide solutions