Well I wouldn't have expected a person with ED to go from, example, 1000kcals to 3000kcal in a matter of days. I think it would take a few weeks to be able to eat that much.

The guideline for average adults is 1800 to 2000 for females and 2000 to 2200 for males, something like that. So a person recovering from an ED should be eating more than the average healthy man? Hmmmmmmm....