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Overview GHK-Cu (Glycyl-L-Histidyl-L-Lysine Copper complex) is an endogenous tripeptide that binds copper(II) ions with high affinity and is present in human plasma at concentrations that decline markedly with age from roughly 200 ng/mL at age 20 to approximately 80 ng/mL by age 60

Both routes are heading to the same destination: PCAC review before February 2027, where the committee will evaluate whether GHK-Cu (in both forms) should be added to the 503A compounding list

When nasal delivery may be preferred Despite lower bioavailability, nasal delivery offers advantages that make it preferable for certain research scenarios