Also known as: Palmitoyl pentapeptide-4, Matrixyl
Pentapeptides are short amino acid chains engineered to mimic fragments of skin's own structural proteins. The most researched version is modeled on a piece of type I procollagen, and it works by signaling skin cells to produce more collagen on their own.
What's notable is how little of it is needed to work. Clinical studies have shown effectiveness at concentrations as low as 3 to 4 ppm. That makes it a good fit for anyone with sensitive or retinoid averse skin who's still looking for collagen support.
