If you want to lose weight by eating three meals a day, you should follow the rule that you should eat well in the morning, be full at noon, and eat less at night. You can't skip breakfast, but you should choose some food with high nutrition and low calorie, such as coarse grain porridge or milk and eggs. At lunch, you can eat more vegetables properly, but the intake of staple food must be reduced. It is best to eat until you are eight minutes full, and you can't overeat. You must try to eat less at dinner. If you can, you can eat some light noodles or coarse grain porridge, and then some salad vegetables, so you can.