Answer: True!
Step-by-step explanation:
For those with anorexia nervosa, harsh stomach acid from frequent vomiting wears away tooth enamel increasing the risk of tooth decay; and the effects of anorexia, especially the lack of nutrients consumed, can weaken the jaw bone which also weakens teeth and leads to tooth loss.
So yes, individuals who suffer from anorexia nervosa are likely to have problems with their teeth due to constant vomiting.