If you're into science that honors the Earth, this is the routine step I keep simple: Skin Perfection Copper Peptide as an easy add in to personalize your hydration base. My quick stack: Natural Copper Peptide Serum Booster 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 Biossance Squalane + Copper Peptide Rapid Plumping Serum GHK Copper Peptide GHK Cu Tripeptide 1