Vitamin C is a water-soluble vitamin that supports normal growth and development. Vitamin C also helps your body absorb iron. Because your body doesn't produce or store vitamin C, it's important to include vitamin C in your diet. For most people, a large orange or a cup of sliced strawberries, chopped red pepper or broccoli provides enough vitamin C for the day. Any extra vitamin C will simply be flushed out of your body in your urine.