copper peptide ghk-cu hair growth evidence review for growthβ¦ does it actually work?π€ Short answer: no. GHK-Cu can be great for skin β but when it comes to hair growth, the just isn't there. And this Cu Hair Serum Thermodynamically stable ionic liquid microemulsions
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However, more human studies are needed to confirm these findings (7)

Dermatological: Wound healing acceleration and comprehensive skin repair studies
Gisterek I, Lata E, Halon A, Matkowski R, Szelachowska J, Biecek P, et al

Some even have wetness indicator lines to show parents when it's wet