Dihydrocholeth-15

Dihydrocholeth-15 is a synthetic emulsifier derived from cholesterol, a naturally occurring lipid found in skin. It belongs to the class of non-ionic surfactants, which means it has a low irritation profile compared to harsher cleansing agents. In skincare formulations, it serves to stabilise mixtures of water and oil-based ingredients that would otherwise separate, allowing formulators to create smooth, uniform textures.This ingredient does not penetrate the skin barrier or act as an active treatment. Instead, it works behind the scenes to improve the texture, spreadability, and stability …

Emulsifiers like dihydrocholeth-15 have a dual molecular nature: one end is attracted to water, the other to oil. This allows them to sit at the boundary between these two phases, holding them together in a stable blend. Without emulsifiers, water and oil would separate, creating an unstable, unusable product.In cleansing or micellar formulations, dihydrocholeth-15 can gently suspend oils and impurities, making them easier to rinse away. Because it is derived from cholesterol—a component of skin's natural lipid barrier—it tends to be well-tolerated by most skin types.

Dihydrocholeth-15 is an ingredient found within finished products rather than a standalone active. Use products containing it as directed on the label. Because it is an emulsifier, it is most commonly found in creams, lotions, cleansers, and micellar waters. There is no need for additional precautions when using products with this ingredient.

Dihydrocholeth-15 is generally well-tolerated and considered a mild emulsifier suitable for sensitive skin. It is approved for use in cosmetics in the UK and EU. Patch testing is always sensible if you have known sensitivities to emulsified products.