Narratives have been shown to alter health beliefs through a process called narrative engagement; however, this process has yet to be empirically investigated for how the increasingly popular young adult (YA) novel format can impact health beliefs about anorexia nervosa among emerging adults. Using an experimental design, we found that the YA format fosters narrative engagement through mechanisms of transportation, which is associated with greater endorsement of accurate social and emotional beliefs about anorexia nervosa. Compared to an informational brochure, the narrative format where the main character was a "supportive peer" (but not experiencing the illness herself) increased self-referencing and was perceived as more relevant among emerging adult participants. Results suggest narratives may be viable tools to communicate about little understood social and emotional aspects of chronic diseases with emerging adults, who are more likely to provide support for sick peers than experience chronic illnesses. Encouraging narrative engagement could facilitate a better understanding of the social and emotional complexity of anorexia nervosa and improve the quality of peer interactions.