Then if you don't eat for 20 days, you can deduct 36,000 calories from your basal metabolism.
It takes 4000 calories to lose one catty, so theoretically you can lose nine catties by fasting for 20 days.
Of course, in fact, I will be much thinner than this, if I can survive a hunger strike for 20 days. After fasting for 20 days, the stool in your body will be discharged, and you can get rid of several pounds. Water will be lost in your body, especially muscles, which may be more than the weight of meat you have lost. So, if you fast for 20 days, you may look a lot thinner. It's just that most of the reduction is invalid. As soon as you start eating, water and stool will come back immediately.
There is also a theoretical weight loss of 9 pounds. In fact, the basal metabolism of the human body will decrease rapidly under hunger strike. Basic metabolism ensures that you can live, and other functions that can be stopped are stopped, so the actual weight loss will be much less.