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A landmark 2007 study published in the Annals of Dermatology titled "The Effect of Tripeptide-Copper Complex on Human Hair Growth In Vitro" directly confirmed that GHK-Cu promotes human hair growth
Chen, L., et al
Patel V, et al
Moreover, due to its potent effect on gastrointestinal function, it can lead to delayed gastric emptying and alter intestinal motility
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