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The Bottom Line GHK-Cu sits in a strange spot in the peptide research world genuinely old research (Pickart's earliest work goes back to the 1970s), genuinely broad mechanistic reach (thousands of modulated genes), but still a compound where the human clinical trial base lags behind the mechanistic and cell-culture data

A 2023 safety review that analyzed 12 clinical studies involving 512 participants found that the most common side effects from topical GHK-Cu were transient redness (4.2% of participants) and mild itching (2.8%)

When there are disruptions in the natural oxidation process, highly unstable and potentially damaging molecules called free radicals are created

Anti-Aging Activity of the GHK Peptide The skin and beyond

Healthy Aging: Higher levels are often associated with better metabolic health and cognitive function

doi:10.1016/j.peptides.2022.170731