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Acknowledgements This work was supported by National Natural Science Foundation of China (grant nos
It can help fade them over time, but it works better as a systemic brightener than a spot treatment
Products from some unregulated pharmacies may be tainted with heavy metals like mercury
FDA cites potential immunogenicity from aggregation and peptide-related impurities and states that human safety data are limited
These effects are amplified when GHK-Cu is combined with procedures like microneedling or laser resurfacing that create controlled tissue injury and demand a repair response
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