MELAO Private Label Skincare 20% Hyaluronic Acid Serum Peptides vs. Retinol Which is Better For Skin Health? GHK Copper Peptide Facial Serum 1% GHK Cu wrinkles crow's feet Hair Shedding eBay copper peptide and retinol TikTok Shop Copper Peptides + Vitamin C and Retinol? Heres How to Layer Them! , GHK Cu works wonders for collagen production, but how do you pair it with other skincare powerhouses like Vitamin C or Retinol? I was super skeptical because I've literally tried everything Retinol destroyed my skin. Vitamin C oxidized and stung. Four different peptide serums and nothing actually worked. Then I tried GHK Cu. 6 weeks