Is it safe to use subcutaneous (SC) GHKCu (glycylhistidyllysine copper peptide) injections for prolonged cycles in combination with ratatrutide (GLP1 agonist)? 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 GHK Cu and Erectile Dysfunction: What the Evidence Actually Shows GHKCu Skin Repair Des Moines Peptide Therapy Iowa IV GHK Cu Cooper Peptide: The Complete Skin & Repair Guide (2026)