I heard a friend say that the homologous series of health foods in the Forbidden City in Beiping have the effect of "preventing and treating diseases before they happen". What do you mean by nip in the bud? Prevention before illness refers to the prevention and treatment of diseases that have not yet appeared symptoms. Simply put, it is to prevent diseases that you have never had or have no symptoms, so it is the function that health food often says, but it is basically just psychological comfort. Health food can only provide the basic nutrition that our human body needs, and has little preventive effect, mainly because of our daily routine.