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 All About GHK Cu Peptide More Than Just Cosmetic Starting my mornings with my go to peptide: GHK I take it 5x a week for collagen support, skin elasticity, hair growth, and overall anti aging benefits. The injection is quick and easy with Copper peptides explained what are the differences between copper peptides and GHK CU peptides? What they actually do for the skin in terms of repair and collagen, and what you can and cant mix Copper Peptide (GHK Cu) 2% Recovery Serum