Is topical GlycylLhistidylLlysine copper (GHKCu) safe for adults, and what are the risks, contraindications, and considerations for systemic use, pregnancy, lactation, and children? Reducing Redness & Inflammation with GHK Cu Copper Peptides Vitali Skincare Absence of evidence isnt evidence of absence its a popular argument, but its not how we should be guiding treatment decisions. In this short, I respond to a comment about GHK Cu injections for In Vitro and in Vivo Studies of pH Sensitive GHK Cu Incorporated Polyaspartic and Polyacrylic Acid Superabsorbent Polymer ACS Omega Injectable Peptides for Anti Aging? A Dermatologist Explains GHK Cu GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack?