Dialectical Behavior Therapy (DBT) is an effective treatment for eating disorders, showing promising remission rates for Binge Eating Disorder (BED) in both standard and guided self-help formats. Traditional guided self-help models typically combine weekly chapter readings with a limited number of brief therapist meetings. However, the requirement of weekly book readings can be particularly challenging for individuals with BED, who often exhibit impulsive personality traits, psychiatric comorbidities, and weight-related health problems.

This study was developed to test a version of guided self-help DBT-BED delivered through video lessons instead of text. This randomized clinical trial will be conducted at the Eating Disorders Program of the Institute of Psychiatry, Hospital das Clínicas, Faculty of Medicine, University of São Paulo (AMBULIM IPq HC FMUSP), Brazil. Eighty adults with BED will be randomized to either an experimental group (weekly video lessons) or a control group (weekly text-based readings).

Both groups will undergo a 13-week intervention, including six brief 30-minute online guidance sessions with a psychologist. The primary outcome will be full remission from binge eating episodes at the end of treatment and at the 3-month follow-up. Secondary outcomes will include changes in eating disorder psychopathology, emotion regulation, quality of life, self-esteem, and dropout rates. Statistical analyses will follow the intention-to-treat principle.

The aim of this randomized controlled trial is to compare the efficacy of a video-based adaptation of guided self-help Dialectical Behavior Therapy for adults with Binge Eating Disorder (BED) with the traditional text-based guided self-help format. The study focuses on clinical remission of binge eating episodes, treatment adherence, and maintenance of therapeutic effects over time.

Eighty adults diagnosed with BED will be recruited through the Eating Disorders Program of the Institute of Psychiatry at the Hospital das Clínicas, Faculty of Medicine, University of São Paulo (AMBULIM IPq HC FMUSP), Brazil. Participants will be randomly assigned to one of two intervention groups. The experimental group will receive the content of the guided self-help DBT-BED manual delivered through weekly video lessons based on the book chapters. The control group will receive the same content in a traditional text-based guided self-help format, following the same weekly structure.

Both groups will participate in six brief individual online guidance sessions with a psychologist, each lasting approximately 30 minutes. These sessions are intended to support treatment engagement, clarify intervention content, address treatment-interfering behaviors, promote generalization of DBT skills, and enhance motivation throughout the intervention.

Assessments will be conducted at baseline, at the end of the intervention period, and at a 3-month follow-up. The primary outcome of the study will be complete remission of binge eating episodes at post-treatment and follow-up. Secondary outcomes will include changes in eating disorder psychopathology, emotional regulation, quality of life, self-esteem, and treatment dropout rates.

The study is scheduled to begin in February 2026, with anticipated completion in December 2026.

Inclusion Criteria:

• Individuals diagnosed with binge eating disorder according to the DSM-5-TR.
• Access to a device with a camera, microphone, and internet connection.
• Minimum ability to read and write in Portuguese.
• Availability of 1 hour per week to read or watch treatment-related content.
• Participants with psychiatric comorbidities must be on a stable medication regimen for at least two months prior to enrollment in the study.

Exclusion Criteria:

• Individuals with anorexia nervosa or bulimia nervosa.
• Individuals with unstable psychiatric comorbidities (exclusion will apply to individuals who have experienced an acute psychiatric exacerbation requiring additional treatment or medical hospitalization.).
• Lack of time to read weekly chapters or watch the video lessons.
• Inability to access devices with a camera, microphone, and internet.
• Inability to attend six brief 30-minute videoconference sessions over the 13-week study period.
• Individuals at imminent risk to life (suicidal or self-harming behavior in the previous three months).
• Lack of minimum reading and writing skills.

At the time of registration, a decision regarding the sharing of individual participant data (IPD) has not yet been made. The research team will evaluate the feasibility of IPD sharing after study completion, considering ethical approvals, participant consent, data protection regulations, and institutional policies. Any future data sharing will be limited to de-identified data and will follow applicable legal and ethical requirements.