Why is the injection site painful after administering GHK Cu (Glycyl L Histidyl L Lysine Copper) 2mg mixed with normal saline? Botox and GHK Cu work in completely different ways. Botox reduces wrinkles by relaxing the muscles in your face so they cannot contract as strongly. When the muscles stop moving as much, the 7% GHK CU ACCELERANT Platinum Skin Care 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