Sodium laureth sulfate (SLES) is a widely used surfactant and detergent found in personal care products such as shampoos, soaps, and toothpaste. This clear, thick liquid functions as a foaming agent and emulsifier, creating lather and effectively removing dirt and oils from surfaces. Derived from coconut oil or petroleum, Sodium laureth sulfate is known for its cleansing effectiveness while remaining relatively gentle on the skin and hair. Although generally considered safe for use in low concentrations in most cosmetic products, Sodium laureth sulfate can sometimes cause skin irritation in individuals with sensitive skin.