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It must be handled and stored properly by qualified professionals in controlled environments

For specifics on layering with common actives, see our deep dives on copper peptides and vitamin C, copper peptides and retinol, and GHK-Cu vs tretinoin.

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GHK-Cu is one of the very few skincare ingredients where the before-and-after story is backed by genuine science rather than clever photography

pharmaceutical-grade Selank Any drug classified as pharmaceutical-grade has met chemical purity standards that make it fit for human use and has been approved or indexed for such by the FDA.23 Research-grade drugs, however, have not met those standards and are, therefore, not suitable for human consumption