Undecylenoyl Glycine

Undecylenoyl Glycine is a synthetic surfactant created by combining undecylenic acid (a fatty acid) with glycine, a naturally occurring amino acid. It belongs to the class of mild, amino acid-derived cleansing agents often chosen for their gentler profile compared to conventional detergents.In skincare products, it functions as a cleanser and surfactant—meaning it helps to lift oils and impurities from the skin surface and allow them to be rinsed away. It is also occasionally used in hair care formulations for its conditioning properties.

As a surfactant, Undecylenoyl Glycine works by reducing the surface tension between oil and water. This allows it to surround oil-soluble dirt and sebum, suspending them in a way that they can be rinsed away with water. The glycine component may provide a slightly gentler profile than synthetic surfactants lacking an amino acid base.

Use this ingredient as part of your regular cleansing routine, typically morning and evening. Because it is most commonly found in cleanser formulations, apply to damp skin, massage gently, and rinse thoroughly with water. No special precautions are needed for routine use.

Undecylenoyl Glycine is generally well-tolerated and considered safe for cosmetic use. It is rarely associated with irritation at typical product concentrations, though as with any surfactant, individual sensitivity varies.