Feed Your Smile with 30 Plants a Week. Eating colorful fruits and vegetables is one of the simplest ways to build a healthy smile. It is not just about nutrition for the body. It is also about creating a strong and balanced environment inside the mouth. Welcome to the Rainbow Smile Challenge. Why Colors Matter for Your Smile Each color in fruits and vegetables contains different nutrients that support your teeth and gums. When you eat a variety of colors, you are naturally su