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Most commercial topical products contain GHK-Cu at concentrations between 0.05% and 2%
Yu et al., 2017)
However, as their popularity has increased so have reports of side effects associated with these agents
[7] [9] Caution is advised in individuals with renal insufficiency or those on dialysis, as impaired clearance may increase the risk of accumulation and toxicity
Collagen loi ll: c tm thy trong cc khp v a m (ng vai tr gim xc cho ct sng khi vn ng)
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