Yes: A person can binge (eat large amounts) and purge (vomit, laxatives), but still absorb a lot of the calories and not get it all out, so can gain weight. If you or someone you know has bulimia, get help very soon, as it can be dangerous, even life threatening, even if not underweight. Vomiting a lot can cause electrolyte imbalances which could cause a heart attack.
Answered 11/11/2015
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