Palmitoyl tripeptide-1 is a signal peptide that results of the conjugation of palmitic acid with tripeptide-1 which performs two functions: signal peptide and carrier peptide when complexed with copper. Palmitoyl tripeptide-1 act on the TGF-β, which is responsible for stimulating dermal fibroblasts to produce ECM proteins, which will reinforce the epidermis, but also reduce wrinkles.

Source: Journal of Drug Delivery Science and Technology - Anti-aging peptides for advanced skincare: Focus on nanodelivery systems