Copper Peptide Serum: Does GHK Cu Really Work for Skin? Radiesse GHK CU This is what it looks like when Biostimulators and Peptides work together! Radiesse + GHK CU work beneath the surface to rebuild your skinboosting collagen, improving texture, restoring natural volume, GHK Cu Scalp Solution Empower Pharmacy Before vs. after 3 months of GHK Cu peptide therapy smoother texture, more even tone, and skin that looks healthier overall. Small peptide, big difference