No. It takes 3,500 calories to gain a solid pound of body weight. One meal will not do that.
just eat.
You might not be anorexic, but you are underweight. You should get about 2250 calories per day until your weight goes up. Slow weight-gain is healthier than the quick kind.
Sadly, no. After you loose a ton of weight while your anorexic, your body sort of gets used to the amount your eating and that's how you can sustain that weight. Once you start to eat more, you throw your body off track and will gain weight rapidly (or at least a lot quicker than you lost it).
You gain weight
gain weight. but stay healthy with it. Dont binge. Just set a goal weight and get an app.
you get fat
well, it depends.if you have trouble loosing weight, and are very over weight, being anorexic wont help. diet and excercise will work the best. maybe you would loose a pound, but most of the time you will just gain even Moore weight.
You gain weight.
No, 800 calories is dangerously low and is still far below your normal caloric needs; calorie intake must be in excess of your daily requirements to gain any weight.
You gain more weight
you gain weight.
You gain a little weight.