COR Protocol for the Treatment of Binge Eating in Chilean Adults (COR)

Inclusion Criteria: * Adults aged 18 years or older. * Overweight or obesity, based on self-report. * At least three binge-eating episodes in the past 30 days, associated with psychological distress. * The presence of chronic medical conditions commonly associated with overweight or obesity (e.g., hypothyroidism, hyperthyroidism, dyslipidemia, hypertension, type 2 diabetes mellitus, or polycystic ovary syndrome) is permitted, provided that such conditions are medically stable. * If present, chronic medical conditions must be medically stable, defined as: * stable medical treatment for at least 12 weeks, * no recent changes in medication, * no acute clinical decompensation or recent major cardiovascular events, * at least one related medical follow-up visit in the past 12 months. * If present, psychopharmacological treatment must be stable, defined as no changes in medication type or dosage during the 12 weeks prior to enrollment. * Daily access to the internet and to a computer or smartphone that allows participation in online sessions and assessments. Exclusion Criteria: * Current compensatory behaviors associated with binge eating, such as self-induced vomiting and/or regular use of laxatives, within the past 60 days. * Pregnancy or breastfeeding at the time of the initial assessment. * History of bariatric surgery. * Active suicidal ideation * Current symptoms consistent with severe mental disorders, such as psychotic disorders, bipolar disorder, complex post-traumatic stress disorder, or severe personality disorders, when associated with marked functional impairment or the need for specialized or higher-intensity clinical care. * Current substance use pattern that, due to its severity or functional impact, requires specialized clinical treatment. * Ongoing psychological and/or nutritional treatment at the time of enrollment, defined as regular sessions or an active treatment plan, regardless of treatment focus or therapeutic approach. * Presence of active or medically unstable conditions, characterized by clinically significant symptoms, lack of medical follow-up, or recent changes in medication, that could interfere with participation in the intervention or substantially affect eating behavior or mood. * Significant functional impairment that, in the clinical judgment of the research team, would limit the participant's ability to engage safely and consistently in the intervention.