GHK Cu For Sale (200mg) Core Peptides 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 GHK CU .005% TRETINOIN .05% ARGIRELINE 20% HYALURONIC ACID ASCORBIC ACID 2% (FACE) 1stChoiceMeds Copper Peptides vs Retinol: Do You Need Both? Nubeean Noosa Copper Peptides vs Retinol Can You Use Copper Peptides With Retinol? 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