Matrixyl Acetate(palmitoyl pentapeptide) is also known as palmitoyl oligopeptide. It is a new skin rejuvenation compound.It is a relatively small molecule related to the precursor of collagen typeⅠ(procollagen typeⅠ).It is found that when added to the culture of fibroblasts( the key collagen producing skin cells). Palmitoyl pentapeptide stimulates the synthesis of the key constituents of the skin matrix: collagen, elastin and glucosamnoglycans.