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 AHK Cu + GHK Cu Hair Serum Pro 4800mg Hair Growth Neurogan Neurogan Health Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000 Peptide Labz Copper Peptide Hair Growth Serum, 10% GHK cu, 5% AHK cu, Rejuvenates Follicles Walmart.com