To eradicate thinness, we must first rule out many chronic diseases such as hyperthyroidism, liver disease, kidney disease and tumor. ; After the disease is eliminated, people with changeable diets should increase their dietary intake and have rich and varied dietary contents. The main food is carbohydrates, and pasta is the most useful. In addition, high-protein foods, vegetables and fruits are indispensable, and healthy snacks, such as peanuts, toffee and potato chips, cannot be left on weekdays.