you don't gain weight when you eat very little. you need to exercise and eat little portions of your meal and you will not gain weight, you will gain muscle by working out but not the weight.
Yes
If you have a slow metabolism you'll gain weight.
Yes you do gain weight.
Everyone should eat iodized salt to prevent thyroid problems, a slow metabolism, and weight gain.
dont eat
To gain weight you child has to eat good food.
To gain weight you have to eat more.
They exercise, and some don't gain weight.
If you don't eat, you're not going to gain weight. The only way to do it would be to eat regularily then eat nothing. Then fat will build up making you gain weight. This is a very unhealthy way to gain weight. It's simple, eat more than you usually do, you gain weight. Eat less, lose weight. Eat the same amount, weight stays the same. Advice for you would be eating three big meals, not much snacking. That way you will get more calories in.
If you eat too much you can gain weight from just about anyhing.
If you eat more calories than you use you will potentially gain weight. If you eat less than you use you will potentially lose weight. If you eat the same as you use your weight should remain stable.