I always go back to that one guy who didn't eat for over a year. Just survived on his own body fat and vitamin supplements for the iodine, potassium, etc.  I've struggled with an ED for over a decade, and when I'm on a starvation kick, I can easily eat only 800 calories in a single week and function like a normal person. Still go work out, go to work, the whole shebang. Im with you. People are fucking deluded.