Palmitoyl Pentapeptide-4 (Matrixyl)

A signal peptide that mimics a collagen breakdown fragment, triggering the skin to produce more collagen, fibronectin, and hyaluronic acid. Strong clinical evidence at 3–5 ppm concentrations. Commonly used in anti-aging serums and eye creams. Well-tolerated alongside retinol and other actives — no notable interaction concerns.