These are all marketing. There is no shortcut to lose weight, and no matter how much guidance you give, it is useless. After all, you are the one who lost weight, not him. To lose weight, you must have willpower and perseverance. You can't shut up and reduce your calorie intake. What you do has no effect, and then you speed up your metabolism and make fat burn faster, which requires aerobic exercise. Therefore, it is impossible for lazy people to lose weight, except for surgery.