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GHK-Cu is a copper-binding tripeptide (glycyl-L-histidyl-L-lysine + copper)
It is one person, chosen because she was an articulate long-term user, and everything in it is her account of herself
several protocol designs combine them
The exact mechanism of peptides acting as antioxidants is not clearly known but some aromatic amino acids and histidine are reported to play an important role in the antioxidant activity
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