How does Cetaphil describe its approach to hydration and skin-barrier support?

Cetaphil says its skincare products help maintain, strengthen and restore the skin barrier, using skin-essential vitamins and nourishing ingredients; it identifies glycerin and shea butter as ingredients that help retain moisture. For dry skin, Cetaphil describes hydrating ingredients such as glycerin and shea butter as supporting the skin barrier and moisture retention, and says its products hydrate without causing irritation.