It must work. Don't eat too much at noon. Eating only cucumbers at night will make you lose a lot of weight in 15 days. However, it is hard to bear without eating. Very uncomfortable. It is best to drink more boiled water at night, 8 cups of boiled water a day, which is good for the skin and easy to digest. Besides, you can definitely lose weight by exercising every day. You can eat apples or something when you are hungry. As for how much you can lose weight, it depends on everyone.