ABSTRACT
Writing about skin hydration means simultaneously writing about dry skin and its treatment by moisturizers. Dry skin has never really been defined in a repeatable way. In fact, this expression prejudices into believing that the skin does have reduced water content, although this was never confirmed or denied. Generally speaking, dry skin signifies that the skin surface looks as though it is lacking in water, this being reinforced by the pharmacological effect of hydrating the skin surface by appropriate treatments.
