Whole grains provide a lot more anti-aging antioxidants and they also provide one of the key elements of a healthy skin diet - fiber. Fiber helps to keep your body clean by absorbing toxins and practically scrubbing your intestines clean. This greatly helps your metabolism and alleviates strain on the liver. Another reason why fiber is helpful is that is absorbs fluids and fills you up quickly. You are clean on the inside, giving your body a chance to focus on making you beautiful by bringing the healthy nutrients to your skin, rather than having to stay focused on removing toxins and debris from your body.