Oilatum gel

Dry skin results from lack of water in the stratum corneum, which is the outer layer of skin cells. When this layer becomes dehydrated it loses its flexibility and becomes cracked, scaly and sometimes itchy. The stratum corneum contains natural water-holding substances that retain water seeping up from the deeper layers of the skin, and water is also normally retained in the stratum corneum by a surface film of natural oil (sebum) and broken-down skin cells, which slow down evaporation of water from the skin surface.

The skin dries out when too much water evaporates from its surface. This increases as we get older, and is made worse by washing, because hot water and soap remove the layer of natural oil on the skin surface.