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In controlled trials, facial creams containing GHK-Cu outperformed vitamin C and retinoic acid creams in improving skin quality metrics
10.1038/s41569-021-00632-2 18 LiL.SuQ.WangY.DaiR.LuY.SuB.et al (2011)
Kosmodermas Glutathione drips are composed of three amino acids, which include glutamic acid, glycine, and cysteine
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