Sodium Lauryl Sulfate (SLS) is defined as surfactant. It is used to clean skin and hair and as emulsifier in cosmetics. In this function, surfactants wet body surfaces, emulsify or solubilize oils and suspend the soil. As such, they can clean the skin and hair by helping water to mix with oil and dirt so that they can be rinsed away or suspend poorly soluble ingredients in water. Therefore we use it mainly shampoo products.