What if I only eat breakfast?

I used to have an eating disorder and I know what it is like. No judgement here. Just saying, you should spread out small meals or snacks throughout the day to avoid passing out. Also only eating once a day slows your metabolism anyway. Best thing to do so you don't ruin your metabolism for when you are older is to eat small meals 200 cals or so 6 times a day and light exercise. You will still lose weight but it is more healthy balance and you won't end up getting fat off of eating 100 calories when you are older by destroying your body's natural metabolism! This is what I did. I am not fat at all, still skinny at 27 because I quit my disorder in my early teens.