Psychological Predictors of Weight Loss Failure in Individuals Enrolled in Structured Obesity Management Programs: A Systematic Review

Background: Obesity remains one of the most significant public health challenges worldwide, with structured obesity management programs representing a cornerstone strategy for weight reduction and long-term metabolic improvement. Despite the implementation of multidisciplinary interventions involving dietary modification, physical activity, behavioral counseling, and pharmacotherapy, a substantial proportion of individuals fail to achieve clinically meaningful weight loss or experience early relapse. Emerging evidence suggests that psychological determinants may significantly influence adherence, behavioral persistence, and treatment outcomes in obesity management programs. Objective: This systematic review aims to critically evaluate the psychological predictors associated with weight loss failure among individuals enrolled in structured obesity management programs. Methods: A systematic review methodology was designed in accordance with PRISMA principles. Relevant literature examining psychological determinants of unsuccessful weight loss outcomes in structured obesity interventions was identified through electronic databases including PubMed, Scopus, Web of Science, and PsycINFO. Key psychological variables explored included depression, anxiety, stress, emotional eating, binge eating behaviors, self-efficacy, motivation, body image dissatisfaction, and personality-related traits. Results: The reviewed evidence consistently demonstrated that psychological variables significantly influence weight loss outcomes. Depression, emotional eating, binge eating disorder, low self-efficacy, and elevated stress levels were among the most frequently reported predictors of poor adherence and unsuccessful weight reduction. Several studies also identified diminished intrinsic motivation and maladaptive coping mechanisms as substantial barriers to sustained behavioral change. Furthermore, individuals with higher psychological distress were more likely to discontinue treatment programs prematurely or regain lost weight during follow-up periods. Conclusion: Psychological determinants play a central role in weight loss failure within structured obesity management programs. Integrating psychological screening, behavioral assessment, and individualized mental health interventions into obesity treatment frameworks may improve adherence and long-term weight management outcomes. Future longitudinal studies are required to establish causal relationships and develop predictive psychological models for personalized obesity care.