Sodium laureth sulfate (SLES) is a widely used surfactant and detergent in personal care products such as shampoos, soaps, and toothpaste. It is a clear, thick liquid that functions as a foaming agent and emulsifier, helping to create lather and remove dirt and oils from surfaces. SLES is derived from coconut oil or petroleum and is known for its ability to cleanse effectively while remaining relatively gentle on the skin and hair. Despite its cleansing properties, SLES can sometimes cause skin irritation in individuals with sensitive skin, although it is considered safe for use in low concentrations in most cosmetic products.