The Chinese say "sickness comes in through the mouth." Food can both sustain and harm, and people need to know what foods are most appropriate to their own body types. From this understanding they can develop correct eating habits, but it requires careful attention.
所謂：「病從口入」，要知道食物對人類而言，有其一利即有其一弊，瞭解真正適合自己身體的食物是那一類，從而採取正確的吃法，這些是最需要注意的。