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The sustained-release formulation ensures that a steady stream of the active, sulfhydryl-rich tripeptide is delivered into systemic circulation

Human evidence is still limited, so peptide therapy should be considered one part of a comprehensive plan, not a standalone cure

A 2016 study published in Nature Scientific Reports showed that GHK-Cu had no cytotoxicity to human keratinocytes at concentrations up to 5,800 micromolar over 72 hours and did not induce inflammatory biomarkers

That can mean more frequent colds, longer recovery times, recurring infections, and even an increased susceptibility to inflammatory or autoimmune conditions