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These compounds can interact with the amino acid residues of proteins, mainly histidine, cysteine, and lysine, to form carbonyl derivatives known as advanced lipoxidation end-products (ALEs) (169)

Gene expression profiling studies have reported that GHK-Cu exposure modulates several genes in human cell preparations, with published analysis of the Broad Institute Connectivity Map gene-expression datasets characterising GHK as modulating the expression of many genes and presenting these transcriptome-wide changes as a basis for the compounds range of documented cellular activities [3], making Copper Tripeptide-1 a compound of interest beyond conventional wound biology research

It's found in two forms, reduced glutathione (GSH) and oxidized glutathione (GSSG)

Quick Answer: Glutathione is generally considered safe because it is naturally produced by the body and present in the placenta, but clinical research on oral supplementation specifically in pregnant women is limited