Lauroylsarcosine sodium is a surfactant commonly used in personal care and cosmetics such as shampoos, facial cleansers and toothpaste. It works by lowering the surface tension of water, allowing it to better penetrate and clean surfaces. Lauroylsarcosine sodium is considered safe for cosmetic use and is approved for use in several countries. However, it can cause skin irritation in high concentrations or with prolonged exposure.