Palmitoyl tetrapeptide-7 (formerly known as palmitoyl tetrapeptide-3 for some reason) is another polypeptide we can find as a cosmeceutical, although it seems the only place I’ve been able to find it is in Matrixyl 3000 as palmitoyl GQPR (glycine-glutamine-proline-arganine connected to palmitic acid). It’s attached to the palmitic acid to make it more oil solubility…