Blend of the fatty acid palmitic acid with several amino acids, including alanine, arginine, aspartic acid, glycine, histidine, lysine, proline, serine, and/or valine. Also known as pal-KTTKS. Theoretically, many peptides have cell-communicating ability and can help skin cells function in a more normal, healthy manner. Although the research is far from conclusive and formulary protocols need to be followed to ensure the peptide remains stable during use, this peptide may stimulate collagen production and encourage the production of intercellular matrix substances such as hyaluronic acid. 
- Robinson L, Fitzgerald N, Doughty D, Dawes N, Berge C, Bissett D. Topical palmitoyl pentapeptide provides improvement in photoaged human facial skin. Int J Cosmet Sci. 2005;27(3):155-60.