GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Glow Peptides India: BPC 157, TB 500 & Copper Peptides Guide GHK Cu Topical Cream GHK Cu Dosage and Protocol: A Medical Provider's Guide to the 30 Day Cycle Perfect B Dr Tahera explains that the topical version of GHK Cu and how it supports skin repair and rejuvenation. This is the cream based approach. Injectables? We'll cover that next. Because understanding your options matters.