 Interventions: Treatment will last 12 weeks in all conditions. Participants in both DBT self-help conditions will be provided with the DBT self-help manual Dialectical Behavior Therapy for Binge Eating: A Self-Help Program. This manual is a self-help version of the well-established therapist-administered DBT treatment manual used in previous trials of DBT for BED. It consists of nine modules that aim to teach three skills to help participants stop binge eating: mindfulness, distress tolerance and emotion regulation. In the GSH condition, participants will receive six 30-minute one-on-one GSH sessions via a secure web-based video-calling program Bluejeans with a clinical psychology doctoral student therapist. GSH sessions will take place weekly for the first 2 weeks, biweekly for 6 weeks and then a final session will take place at week 12. The video-calling program allows GSH sessions to be recorded for supervision and treatment monitoring purposes. GSH therapists will have weekly group supervision meetings with the principal investigator to discuss any questions or challenges that arise. In both unguided self-help conditions, participants will be asked to do their best to follow the advice in the self-help manual on their own over the next 12 weeks. 