GHK Cu Hair & Scalp Serum 2400mg 4% Less Shedding Neurogan Neurogan Health Amazon.com: Skin Perfection Copper Peptide Serum GHK CU 1% for Face & Hair Copper Peptides for Skin, Hair, & Scalp 1% Blue Liquid for Face, Neck, Body, Scalp Multi Use Serum Booster with 6 month GHK CU check in Main takeaway: skin transformation takes time. GHK CU peptide binds to copper and activates genes involved in wound healing, collagen synthesis, and skin remodeling. On the face, this translates Okay but Ive only been using GHK Cu for 2 weeks and Im already noticing my skin looking firmer and my fine lines softening. I wasnt expecting to see results this fast but Im loving the glow. DM Longevity: Functional Medicine for Optimal Health and Wellness