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 How to Inject Peptide Based Medications (Subcutaneous Method) Hone Health Is it safe to use subcutaneous (SC) GHKCu (glycylhistidyllysine copper peptide) injections for prolonged cycles in combination with ratatrutide (GLP1 agonist)? Subcutaneous Injection Sites and Instructions for Safe Self Administration Skin Restoration: Prioritizing Safety Over Trends