answer:So, how old are you? Have you had more than one time like this? I think that for healthy people who have normal diets, it is not considered super bad to fast for a day every once in awhile. But it’s almost as if, if you have to ask this question, you might know the answer. And you brought up anorexic, so we don’t know if that is a problem for you or not. But you do. If you are anorexic, please go get help right away. As I suspect you know, it can be serious. So don’t mess around.