Skin cell turnover (or regeneration) is a natural process in the epidermis layer. Dead skin cells are shed before new skin cells produced in the bottommost layer migrate to the surface. This entire cycle typically takes 28 to 40 days for the average person but can vary depending on age, genetics, and overall skin health.
An even, radiant skin tone is achieved by maintaining a high and efficient cell turnover rate. This also involves keeping the skin cells hydrated. When they lack moisture, the skin–like other organs–cannot function properly. Dehydrated skin weakens the cells and interrupts their natural processes. The skin becomes less elastic and dull, with an increased risk of inflammation. Think of your skin cells as grapes–round and plump when hydrated, rough and wrinkly like raisins when dehydrated.
Many factors cause dehydrated skin. The skin can lose moisture due to weather, lack of water intake, excessive hot showers, air-conditioning, and improper skin care.