Peptide

Palmitoyl Pentapeptide-4

Palmitoyl pentapeptide-4, sold under the trade name Matrixyl, is a cell-communicating peptide composed of five amino acids (lysine–threonine–threonine–lysine–serine, or KTTKS) derived from type I collagen, with palmitic acid attached to improve skin penetration and oil solubility. It works by signalling fibroblasts to produce collagen, elastin and hyaluronic acid, mimicking the body's natural wound-healing response. Clinical studies show it can reduce the appearance of fine lines and wrinkles at very low concentrations (as low as 0.0003%).