First of all, you should change your eating habits, be sure not to eat too greasy and spicy, control the staple food and not eat supper. Increase vegetables and fruits.
Be sure to exercise and increase the amount of exercise step by step. You can choose the way you like and run aerobics, whatever you want. The important thing is to stick to it and it will be effective.
If these can't be done, you can only use meal replacement products or weight loss products in a short time.