If you're using GHK Cu and it stings a little (which is common) this one's for you In this reel I'm sharing the small tweaks that have helped me make peptide injections Quantitation of Copper Tripeptide in Cosmetics via Fabric Phase Sorptive Extraction Combined with Zwitterionic Hydrophilic Interaction Liquid Chromatography and UV Vis Detection Reuse of needles & syringes is the most common cause of cross contamination. Dispovan single use needles cause minimal pain to the patient & prevent reuse to lower the risk of infection. Learn more GHK Cu Reconstitution: BAC Water Volume by Vial Size Dr. Oracle