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Blood 112 , 470478 (2008)

Uh, it's thought to help with tissue repair and regeneration

USA 107 , 1524015245 (2010)
The catch: at 340.4 daltons, GHK-Cu sits above the 500-dalton passive penetration ceiling of intact human skin
Behboudi-Gandevani S, Bidhendi-Yarandi R, Panahi MH, Vaismoradi M
