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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
Neither is universally better
The sustained-release formulation ensures that a steady stream of the active, sulfhydryl-rich tripeptide is delivered into systemic circulation
Every production batch undergoes independent HPLC purity testing and mass spectrometry identity verification before release
That can mean more frequent colds, longer recovery times, recurring infections, and even an increased susceptibility to inflammatory or autoimmune conditions
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