http://nighttimemoisturizers.com Moisturizer helps to form a fine, protective layer that enables the skin to retain the moisture it requires. Moisturizing is essential for all types of skin including oily skin. Dry skin and ageing skin derive the maximum benefits from a moisturizer. Lack of moisture on the skin causes skin to become dry and more prone to wrinkling. Moisturizers come in two forms liquid and cream. Rich, liquid and cream moisturizers take care of dry and wrinkled skin. Water - based, oil free moisturizer works best for oily skin. Herbal moisturizers are very light. They not only help to protect the skin but also assist in evaporating excess of moisture.