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More resilient skin can handle 1-2% concentrations from the start

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Results can vary widely depending on the underlying cause of hair loss, overall health, and consistency of use

Cell culture and transfection Human embryonic kidney 293 (HEK-293, CVCL_0045) cells were obtained from the American Type Culture Collection (Manassas, VA, USA) and cultured in minimal essential medium supplemented with 10% fetal bovine serum (FBS

Lopez-Cavestany M, Hahn SB, Hope JM, et al

Published human data includes a small 2017 study in the International Journal of Molecular Sciences reporting improved skin firmness after topical GHK-Cu application over 12 weeks