When you say fast food, do you mean fast food? Wouldn't it be fatal if all the food was cut off? So all you have to do is make sure to eat fruits or vegetables. As for detoxification, try to ensure that you eat fungus and mushrooms every day for 28 days, which is one of the best foods for detoxification. Because my friend's mother is in bed for a long time, she eats these two foods every day to ensure smooth stool. I wish you success in detoxification!