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The safety margin sits approximately 300-fold above therapeutic doses, making GHK-Cu one of the most well-tolerated peptides available for research purposes

Research overwhelmingly describes the safety of GHK-Cu positively, such as when the authors of a 2018 review called it a safe, inexpensive, extensively studied compound.14 However, even though copper peptides have demonstrated an impressive safety track record in studies, there are (as with most skin care actives) a few safety risks to consider

GHK-Cu is studied for stimulating collagen and elastin production, supporting the formation of new blood vessels and skin cells, and acting as an antioxidant and anti-inflammatory in tissue

PMCID: PMC4627938