PeptideLabz Copper Peptide 10% GHK CU 5% AHK CU Peptides Hair Growth Treatment Serum, Blue Price Neurogan GHK Cu Copper Peptide Hair & Scalp Serum 2400mg, 4% Copper Canadian Glow Beauty, Skincare, Hair & Personal Care GHK Cu is more than a skincare trend its a copper peptide involved in repair, regeneration, and cellular signaling., This peptide has been studied for its connection to collagen production, skin If your GHK injection site gets irritated try this , 1. Dilute it by adding more water to the syringe , 2. Let it sit until it reaches room temperature , Also, make sure youre rotating injection