Most beginners make one mistake when learning about peptides They focus on which peptide to use, but completely overlook cycle length. C In research and educational discussions, cycle length usually refers to GHK Cu vs NAD+: Which Longevity Peptide Should You Take or Stack? GHK Cu Peptide Therapy: The Definitive Clinical Guide to Gene Modulation, Protocols, and Efficacy Just started GHK Cu? Here's what to expect This isn't an overnight peptide, it builds Weeks 12: You may start noticing small shiftsskin feels a bit smoother, nails a little stronger Weeks 34: