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Eligible studies evaluated an internet\u2010based treatment for ED, or an ED treatment that included at least one internet\u2010based component.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Twenty\u2010one studies were included. Methodological quality varied. Internet\u2010based treatments were superior to waiting lists in reducing ED psychopathology, frequency of binge eating and purging, and in improving (ED\u2010related) quality of life. Internet\u2010based treatment was more effective for individuals with less comorbid psychopathology, binge eating as opposed to restrictive problems, and individuals with binge eating disorder as opposed to bulimia nervosa. Higher levels of compliance were related to more improvements in ED symptoms. Study dropout ranged from 5.3 to 76.8%. Inclusion of face\u2010to\u2010face assessments and therapist support seemed to enhance study compliance. Overall, the internet can be considered an acceptable vehicle for delivering ED treatment.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>Future research should determine the utility of internet\u2010based treatment by comparing them to face\u2010to\u2010face treatment. Research should furthermore focus on unraveling predictors and mediators of treatment outcome, compliance, and dropout, respectively. Studies with good methodological quality are needed with reports according to CONSORT guidelines.  \u00a9 2013 by Wiley Periodicals, Inc. 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