GHK Cu: The Peptide That Transforms Skin and Tissue Health Calibrate Hydration 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 Can I Use Ghk Cu With Tretinoin Alternating tretinoin and GHK Cu (copper peptides) nightly maximizes anti aging benefits while minimizing irritation. , Both are potent but DIFFERENT actives. Tretinoin speeds up cell turnover and Losing weight or optimizing hormones but your skin isnt keeping up?, We offer different GHK Cu skin formulas depending on your goals:, GHK Cu + Tretinoin to support real skin renewal, GHK Cu +