Bulimia can be especially damaging to the teeth. Vomit is toxic because it contains stomach acids. These acids break down food in your stomach so your body can digest it. When in the mouth, the acids are corrosive enough to wear away at the enamel that covers and protects your teeth. Brushing your teeth too hard after you vomit can also contribute to tooth decay. The color and texture change as the erosion gets worse. Teeth may be weaker and more brittle than usual as a result of repeated purging. Bulimia can also change the shape and length of the teeth.

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