GHK Cu (50 MG) Sigma Compounds Experiencing itching & burning from your GHK CU peptide injections? Try these to hacks: 1. Use a longer syringe to penetrate deeper into the fat cells. 2. Dilute the copper. Here I Why is GHK delivery challenging? Injectable forms are not approved worldwide safety risks if self injected Topical creams & serums cannot penetrate deeply most GHK stays on skin surface If youre using GHK Cu and it stings a little (which is common) this ones for you , In this reel Im sharing the small tweaks that have helped me make peptide injections way more comfortable