BULIMIA: When you binge eat then vomit, approximately what percentage of the calories from the food are absorbed before vomiting? I know it depends on things like type of food, time in stomach, and individual differences. But what is an approx range?

Like you said, it depends. There is no average because there are so many variables.

same here, im bulimic like they say, it depends, depends of what kinds of foods you were eating some foods takes time to be crushed down and absorbed inside your body (you'll know if you eat something and throw it up and still looks the same when you eat it, like grains and rice,) because it hasn't been chemically changed yet, also eating then running to the bathroom to throw up(meaning no 15 mins waiting) is a lot succesful to throw up almost of the food you've ate. you can also feel if there is still food you've missed inside you( i dunno but if there's something left after i throw up i can feel it) this post is not an encouragement for you to practise it. some people may judge us bulimics to persuade others to do wrong habits were practising but were not ok? it's not fun to be bulimic, and im not even bragging that 'hey! this is my lifestyle! i can eat all foods w/o gaining weight fast! can you do it?' duh! it's not like that! others will never understand our feelings unless they'll have an eating disorder too, please do bear with us and help those whom you've suspecting to have this disoreder. thank you.

As a rule of thumb I remember learning from medical's that after 4 hours of consumption you may assume your stomach has started working on whatever it was you consumed before that. The first half of your question is impossible to answer in my opinion, it just depends on too many variables.