Diethanolaminooleamide DEA

Diethanolaminooleamide DEA is a synthetic surfactant derived from oleic acid (a fatty acid) and diethanolamine. It functions primarily as a foam booster and viscosity controller in skincare products, particularly in cleansers and wash formulations where texture and lather consistency matter.In formulations, this ingredient helps create and maintain stable foam, which many people associate with effective cleansing, whilst also helping to thicken or adjust the consistency of liquid products. It is distinct from primary cleansing surfactants but works alongside them to improve the sensory expe…

Diethanolaminooleamide DEA is amphiphilic, meaning it has both water-loving and oil-loving regions. This dual nature allows it to sit at the interface between water and air, stabilising bubbles and creating foam. It also helps reduce the surface tension of liquids, making them feel lighter and easier to spread across the skin.As a viscosity modifier, it interacts with other ingredients in the formulation to thicken or thin the product, ensuring the right texture for application and user preference.

Products containing diethanolaminooleamide DEA are typically used as directed on the label—most often as part of daily cleansing routines. Since it is a supporting ingredient rather than an active treatment, its benefits are realised through consistent use of the overall product rather than through standalone application or special timing.

Diethanolaminooleamide DEA is considered safe for use in cosmetic products at approved concentrations. It is not known to be a common skin irritant or sensitiser, though those with very sensitive skin should patch test first as with any new product.