GHK Cu 50mg 100mg Copper Peptide (RUO) Tide Labs Tide Labs GHK Cu G Lab Peptides GHK CU Peptide Drip Gym DripGym Peptide Inhibitors Targeting FOXO4 p53 Interactions and Inducing Senescent Cancer Cell specific Apoptosis Journal of Medicinal Chemistry The GHK Cu pen works. But needles at home were never the answer. We took the same clinically backed copper peptide complex and put it into a serum you can use in 30 seconds, The FOXO4 peptide in a DRI conformation (D amino acids in a retro reversed sequence), henceforth named FOXO4 DRI, competes with FOXO4 for p53 binding in a dose dependent manner and doing so with higher affinity.