It’s great to have smooth, wrinkle-free skin—probably why you slather on SPF every morning. But what you may not realize is that what you put on your body is only half the battle. What you put in your body is just as important when combating environmental factors such as UV radiation and free radicals. Not sure what to nosh on? Experts explain the ins and outs of nutrients and antioxidants that contribute to radiant, healthy skin.