Eat food with high carbohydrate content to gain weight the fastest, such as steamed buns, corn, bananas, bread and other foods. Food rich in carbohydrates can effectively participate in the blood circulation after entering the body, and can be effectively decomposed, metabolized and absorbed by various enzymes in the gastrointestinal tract. After being decomposed into monosaccharides and polysaccharides, they can be transferred to the blood and liver for metabolism, increasing the body’s ability to absorb nutrients. It can also effectively help the liver to break down glycogen and maintain the body’s basic immunity. Cells are also made up of carbohydrates, and food can effectively replenish the energy of cells, promote the metabolism of cells in the body, and fully replenish the protein needed in the body, which can cause fat to be deposited continuously and easily lead to the patient gaining weight.