["European Eating Disorders Review, Volume 34, Issue 3, Page 811-822, May 2026. ", "\nABSTRACT\n\nAim\nEmerging adults (EAs), aged 18–25, may have distinct characteristics and, therefore, treatment needs compared to adults over 25 (adults > 25) that are poorly understood.\n\n\nObjective\nThis study compares EAs to adults > 25 entering eating disorder (ED) treatment to better characterise their differences.\n\n\nMethod\nParticipants were 623 individuals (332 EAs; 291 adults > 25) with anorexia nervosa, bulimia nervosa, or related OSFED, referred to outpatient ED treatment from 2004–2020. Using retrospective demographic data, assessment information, and treatment attendance, EAs were compared to adults > 25 on: demographic characteristics, high‐risk behaviours, diagnostic profiles, substance use, and treatment engagement. EAs with and without prior ED treatment were compared.\n\n\nResults\nOver half (55%) of EAs report living with family versus 14% of adults > 25. EAs reported more self‐harm, ED‐related theft, and greater cannabis use than adults > 25. While there were no differences in rates of comorbidity, EAs were less likely to have received treatment for comorbid illnesses. EAs without previous ED treatment were also more likely to disengage from treatment than those with prior treatment.\n\n\nConclusions\nEAs and adults > 25 demonstrate similar diagnostic profiles and rates of treatment drop‐out. However, EAs may need individualised treatment planning for high‐risk behaviours and comorbid illnesses. Recommendations for the care of EAs in adult programs are made.\n\n"]