GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Copper Peptides Elmhurst IL Chicago Accelerated Aesthetics Is topical GlycylLhistidylLlysine copper (GHKCu) safe for adults, and what are the risks, contraindications, and considerations for systemic use, pregnancy, lactation, and children? Ever heard of GHK Cu peptide? It's a naturally occurring copper peptide that helps repair tissue, stimulate collagen, and support skin healing. When used in injectable form, it works at a deeper level GHK Cu Injection AgelessRx