Sometimes, during the dry winter months or after a professional procedure, skin needs an extra boost of moisture. SkinMedica Hydrating Complex is a lightweight serum that helps to improve the performance of your regular moisturizer. It contains sodium hyaluronate, a hyaluronic acid derivative that has the ability to retain up to 40 times its own weight in water, to help bind moisture to the skin and create a plump complexion. It also contains vitamin B5, betaine and other hydrating ingredients to help ensure that skin stays comfortable all day. Nutrients infuse skin with the vitamins it needs to stay healthy and balanced.