Weight loss how many calories a day to eat is not a uniform standard, need to be developed according to the activities of the human body and physical conditions, but if you want to lose weight it is best to eat less calorie food every day, less calorie food can help the body to lose weight. If the intake of too little is easy to cause adverse effects on the body function, weight loss in 100kg of people need to eat 1300-1500kcal of calories a day to ensure the normal physiological function of the body, to ensure the normal physiological function of the human body can make the body fat can be oxidation consumption, reduce the accumulation of body fat. Normally, you should eat more low-calorie foods, such as vegetables, fruits, coarse grains, etc., supplemented by a small amount of low-calorie meat. It is not recommended to diet to lose weight, it is best to lose weight through a combination of exercise and diet, exercise to lose weight can not only accelerate the oxidative consumption of body fat, but also improve the physical quality of the human body to enhance the immune system.