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Purity is unverifiable at the consumer level: As a grey-market research chemical, material sold as Dihexa is not subject to pharmaceutical quality control identity, purity, and solvent residue are not guaranteed
Both experts agree that copper peptides will likely continue to grow in popularity because they fit the current trend toward bioactive, science-backed ingredients that support skin longevity and repair
At a molecular weight of approximately 340 Da as the free tripeptide (see the GHK-Cu compound overview), it sits below the 500 Da threshold commonly associated with good dermal penetration a key reason GHK-Cu topical serum formulations achieve dermal absorption where many larger cosmetic peptides do not
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J Immunol Res (2018) 2018:9412387
GHK-Cu GHK-Cu is a naturally occurring copper complex of the tripeptide glycyl-L-histidyl-L-lysine
