GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? Fraley What's the difference between GHK Cu (copper peptide) as a topical cream vs an injection? In this video I break down: What GHK Cu is and why it's used in anti aging skincare GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu Peptide Therapy Brea, CA Orange County Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference