GHK Cu Copper Peptides: Topical vs Injectable 7% GHK CU ACCELERANT Platinum Skin Care GHK Cu Topical vs Injection Which is the Better Copper Peptide Form? Before and after begins with consistency. Our 10% GHK Cu formula is engineered for deep absorption to support scalp health and visible density. The Blue Revolution: Why 1% Pure GHK Cu is the New Standard for Mature Pure & Cimple Copper Peptide Serum with 1% GHK Cu peptide, Argireline and Matrixyl 3000