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 Wellness peptide craze: why people are injecting drugs 'not for human consumption' GHK Copper Peptide GHK Cu Tripeptide 1 Glow Peptide Protocol GHK Cu, BPC 157, TB 500 Neurogan Health Amazon.com: QUBIT GHK Cu Copper Peptide Supplement for Skin & Hair, Easy to Absorb, Precisely Dosed 90 Vegan Capsules : Health & Household