Cashmere Cream: Advanced Anti Aging Treatment 30g GHK Cu Hyaluronic Acid Gel Wells Pharmacy Network Collagen Trois: Tretinoin + Copper + Estriol Trio UluRx 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 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 The Effect of the Human Peptide GHK on Gene Expression Relevant to Nervous System Function and Cognitive Decline