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Background: Despite previous research on the association between diabetes distress and disordered eating behaviors (DEBs) among youth with type 1 diabetes (T1D), there is a lack of understanding regarding the underlying mechanisms. This study aimed to investigate the relationships between diabetes distress and DEBs, specifically examining whether self-regulatory fatigue mediated the relationship and whether resilience moderated this mediation. Methods: A cross-sectional study was performed among youth with T1D recruited from two diabetes centers in Nanjing, China. Measurement instruments included the problem areas in the diabetes-5 scale, the diabetes strengths and resilience measure for adolescents, the self-regulatory fatigue scale, and the Chinese version of diabetes eating problem survey-revised. Mediation and moderated mediation analyses were conducted. Results: A total of 185 youths with T1D were involved in the current study. The results indicated that diabetes distress positively predicted DEBs. Self-regulatory fatigue partially mediated the association between diabetes distress and DEBs, accounting for 50.88% of the overall effect. Additionally, the pathway from self-regulatory fatigue to DEBs was moderated by resilience. Conclusion: The current study examined whether self-regulatory fatigue mediated the relationship between diabetes distress and DEBs and whether resilience moderated the connection between self-regulatory fatigue and DEBs. These findings add to the theoretical basis of how diabetes distress influences DEBs and help guide the incorporation of diabetes distress, self-regulatory fatigue, and resilience into DEBs reduction programs for youth with T1D. Plain English Summary: A high prevalence of disordered eating behaviors (DEBs) has been observed among youth with type 1 diabetes (T1D), leading to poor glycemic control, significant short- and long-term consequences, and an increased mortality risk. It is crucial to closely monitor DEBs in this population and identify factors that can be modified to develop targeted interventions. While previous studies have shown that diabetes distress, which refers to negative emotions specific to diabetes, is a positive predictor of DEBs, no research has examined how diabetes distress affects DEBs. Our cross-sectional study discovered a significant association between diabetes distress, self-regulatory fatigue, and an increased likelihood of experiencing DEBs. Furthermore, low resilience exacerbates this relationship, whereas high resilience weakens it. These findings highlight the importance of integrating resilience, self-regulatory fatigue, and diabetes distress in DEBs reduction programs among youth with T1D. [ABSTRACT FROM AUTHOR]