Found endogenously in human plasma (~200 ng/mL at age 20), saliva, and urine, GHK-Cu forms a high-affinity complex with copper(II) ions through its histidine imidazole nitrogen and peptide backbone coordination
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About the Author: Julia Lloyd, MPH, RD, LDN, CDCES, is a registered dietitian and diabetes educator specializing in GLP-1 counseling
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