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Hypovitaminosis C in patients treated with high-dose interleukin 2 and lymphokine-activated killer cells

While GHK-Cu is a well-researched topical ingredient, injectable GHK-Cu peptides are neither FDA approved nor regulated and aren't recommended

Unlocking the Potential of Copper Peptide GHK-Cu So, what exactly is GHK-Cu

GHK-Cu, the tripeptide glycyl-L-histidyl-L-lysine bound to copper, demonstrates activity at concentrations that would seem impossibly small to anyone familiar with standard peptide dosing

The strongest human clinical evidence is for topical use, including the Leyden 2002 photoaging trial and a 2023 NEEL gel topical study reporting an average 28% increase in skin collagen density at 3 months