Too thin is not recommended. In fact, the fat in our body has five advantages: heat preservation, energy storage, participation in metabolism, vitamin delivery and so on. If there is too little fat, we can't maintain normal body operation, which will lead to many diseases. According to your height and weight, it is a normal standard! If you want to further protect yourself, you should follow such a principle: "Eat like an emperor in the morning, like a commoner at noon and like a beggar at night."