Here's the thing you have to know to fight the natural aging process. The skin fully replaces itself about once each month. Outer layer or the Epidermis consists of tough, flattened dead cells that form a protective layer. Newer cells that are created in the Dermis are continuously shedding and replacing this outermost layer of dead cells, then pushed up from below. Dead cells pile up on the skin's surface and when this process slows down with age, your Skin Care becomes dull and lifeless.