10% GHK CU 5% AHK CU Copper Peptide Serum Powerful Hair Growth Treatment, Reduces Thinning & Thickens Hair Fruugo NL Small molecules. Powerful results. Experience Peptide Power with Hairgenetix's advanced Copper Peptide Hair Growth Serum, formulated with 10% GHK Cu and 5% AHK Cu to support hair health at the follicle level. Helps Where science meets stronger hair. A lightweight serum powered by 10% GHK Cu & 5% AHK Cu, designed for visibly thicker roots and a resilient scalp barrier. Fuller, healthier looking hair begins here. [ Set Hairgenetix Set Ahk Cu + Ghk Cu Hair Serum Pro PrettyStick