Though it may be cold outside, make sure to stay hydrated. Water helps dissolve nutrients in food, which makes it easier for your body to absorb them. It also helps carry those nutrients to the cells in your body. Plain water is often the best choice to stay hydrated. You can add a fresh squeeze of lemon, lime, or orange for flavor and to boost your intake of vitamin C. Foods with high water content can also help you stay hydrated. Lots of fruits and veggies fit the bill. Low-sodium soups and broths can also be healthy options.