Fruit juices, especially citrus, apple, and berry varieties, are loaded with the kinds of acids that wear down tooth enamel. Of course, juices also have some great-for-you qualities, too -- like vitamins and antioxidants. So don't write them off completely. Just drink them in moderation. Frequent fruit juice consumption has been linked to an increased risk of enamel erosion. As an extra measure, rinse afterward. And choose calcium-fortified juices that may pose less of a hazard to tooth enamel. Find out which is worse for teeth -- OJ or tea.