This is possibly the most ridiculous myth out there or one of the most ridiculous. The myth is if you eat too little food or calories, your body will go into a starvation mode and cause you to gain weight. The theory at work here is your body will respond by preventing fat loss and in turn will make you gain weight. This is not true at all. It’s complete nonsense.
The reason people might think this is true is because if you eat too little, you will get too hungry and start binging. So in effect, you are not eating too little. You are definitely eating too much. Think about it this way, if eating too little caused weight gain, there would be no such thing as Anorexia. Or starving people in third world countries. I hate to bring those two points up, but it gives you perspective!