Methods to check malnutrition: 1. Dietary survey, asking the type and quantity of food eaten by the patient, so as to deduce the amount of energy and various nutrients taken into the body, and determine whether the patient has malnutrition. 2. Physical examination, such as calculating the patient’s body mass index, measuring the chest circumference, waist circumference, thigh circumference, weight, so as to determine whether the patient has malnutrition. 3. Blood test For example, to test the protein, fat, blood sugar, lipid, vitamin and mineral in the blood to determine whether malnutrition exists.