Keywordsintermittent energy restriction; fasting; weight loss; weight gain; obesity; morbid obesity; psychology; dysfunctional cognition; mental health; grounded theory; health care professionals; diet therapy; knowledge utilization; philosophy; relationships; patient-provider; theory development; anorexia nervosa; cognitive remediation therapy; eating disorders; treatment satisfaction; neuropsychology; rigidity; cognitive flexibility; central coherence; eating disorder; men; treatment; experiences; bulimia nervosa; online treatment; self-monitoring; regular eating; cognitive behavioural therapy; objective binge episodes; purging; virtual reality; systematic review; binge–purging eating disorders; bulimia nervosa; binge eating disorder; adherence; obesity; diet-reducing; appetite; recurrent binge eating; illicit substance use; binge eating disorder; longitudinal; co-morbidity; symptom trajectory; culture; health; ethnic culture; mainstream culture; health behaviors; picking and choosing; healthy makeovers; binge eating; food addiction; intervention; weight loss; web-based; randomized controlled trial; calorie restriction; eHealth