One of the maxims of Chinese dietetics is that foods have their benefits but also their disadvantages. This means that for a person of one body type to eat a certain food may be good for their health, but for a person of another body type to eat the same food may not only be of no benefit, but may even be positively harmful.
中國食學當中有「食物有其一利，亦有其一弊」的說法，也就是說，同樣一種食物，甲類體型的人吃了，對身體會有好的作用，而乙類體型的人吃了，不但無益，反而有害。