Matrixyl is actually one of my favorite peptides out there. Matrixyl has been used for ages, and it is the definition of a good peptide, producing more collagen and elastin stores within the skin, which effectively rebuilds them and also makes the skin softer, smoother, wrinkle free in general with a reduction in stretch marks and otherwise as well. This being said, it is also known by the name of palmitoyl pentapeptide-4, and it is in the form of matrixyl 3000 as well, which is said to be more powerful than the original Matrixyl. It basically is produced by Sederma & Proctor & Gamble, and it has been proven to significantly increase the skin’s natural production of collagen and elastin to effectively rebuild it. It has basically been proven to provide better results than retinol without the side effects. Now keep in mind, Matrixyl can work on its own. But it’s best application is actually in complimenting and improving the possible results of every other peptide or other wrinkle fighting ingredient in the book. It is extremely powerful, and that application is not to be ignored in the least. It is definitely a multi use peptide, and I wouldn’t use a formula without it.