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Because research-grade material is not manufactured to sterile-injectable pharmaceutical standards, sterility and endotoxin content are not guaranteed by the supplier the way they would be for an approved parenteral drug a point that belongs squarely in the safety discussion below
K., Hsu, J
Further Reading For additional peer-reviewed research on this topic, see: PubMed research on GHK-Cu gene expression and NIH review of copper peptide wound healing mechanisms
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