You're injecting what now?! We've been flooded with questions about injectable peptides, so here's the bottom line: I would not inject these into myself or anyone I care about. Note: This is GHK Cu Injection Beauty Refined Neurogan Health, copper peptide GHK CU, 120 mcg, 60 tablets iHerb Copper peptide questions we get asked all the time How often should you use it? Do you need to avoid the sun? If you're new, start once daily (evenings are great),