GHK Cu 200MG (Topical) Raw Amino Cu GHK vs Tretinoin: The Anti Aging Showdown TikTok There is no definitive answer as to whether retinol vs peptides are better for anti aging. However, there is a lot more research backing retinol as an effective ingredient, while peptides are still Peptides vs. Retinol Which is Better For Skin Health? Copper Peptides vs Retinol: Do You Need Both? Nubeean Noosa 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