GHK Cu Peptide 2026: FDA Approved? Dosage & Where To Buy PDF) Regenerative and Protective Actions of the GHK Cu Peptide in the Light of the New Gene Data 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK 12 weeks in, and my skin has NEVER looked better! GHK peptides are doing their thing. Alright, I need to give you an updateit's been 12 weeks since I started using GHK This is one of the biggest peptide regulatory shifts in years. And it's just getting started. The FDA has taken its first step toward reversing its 2023 stance, removing 12 peptides from