Bala Krishna Reddy
For anyone who's trying to gain or lose weight. This is the most basic and primary thing to understand. Your daily calorie intake will decide if you are going to gain or lose weight. If you are a person who maintains body weight when you consume X calories per day, then X is your maintenance calories. If you have to gain weight, you have to eat more than X calories. Similarly if you have to lose weight, you'll have to eat less X calories. There is no other way.