The so-called fasting and detoxification means not eating for a while. When people or animals are sick or depressed, they often lose their appetite. This is because the body is unwilling to make old wastes, white elephants, acid poisoning and other pathogenic substances, which is also an instinct of natural therapy in the biological world.
It seems that many white-collar workers and gold collars are very popular now, and some foreign celebrities like Madonna and gwyneth paltrow are fans of "fasting" therapy.
I can only tell you the experience of being friends around me. First, my friends usually don't eat for two or three days, four or five days at most, like you for three weeks. Well, that's unheard of.
Second, fasting is not about not eating, but eating unhealthy. I am surrounded by professional dietitians making recipes. It is estimated that as a student, you should not have this condition. Eat 30% to 50% full every meal.
Third, fasting and detoxification is not just about eating less. In this process, you should keep your body and mind happy, go to bed early and get up early, read books, and keep a healthy life under light exercise.
By the way, digression, in fact, we really need to question whether fasting is useful or not. . . I really think the effect of dieting to lose weight is very general.