Chug a lot of H20? Great. But for even better hydration, consider hitting the produce aisle. "Raw fruits and vegetables are full of antioxidants and phytonutrients, and they're mostly water," says dermatologist Dr. Howard Murad. "When consumed via food, water releases more gradually and penetrates the cells better. Fruits and veggies also make your body more alkaline, "which is good for your skin.