No, breakfast is the energy source of brain activity. If you don't eat breakfast, your body can't supply enough blood sugar for consumption, and you will feel tired, weak, inattentive, depressed and unresponsive. I once fainted at work because I didn't eat breakfast and had hypoglycemia. This is very harmful to the body. So don't go on a diet blindly to lose weight. Want to lose weight healthily and exercise more.