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Because copper is a required cofactor for numerous enzymes involved in cellular metabolism and antioxidant activity, researchers studying GHK-Cus copper-binding properties often position it as a tool for understanding copper-dependent signaling pathways generally, not just those specific to skin or tissue repair
However, because the intestines contain an enzyme that degrades glutathione, this can reduce the bioavailability of glutathione in food and also most oral supplements
doi:10.3390/ijms26062691 Gatta M, Dovizio M, Milillo C, et al
This was supplemented by hand-searching relevant article reference lists and reviewing select FDA, ISPOR, and ISOQOL qualitative research guidance
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