When an elderly person has a cold, the cold virus will cause the digestive function of the gastrointestinal tract to decrease, so it is best to eat simple, light and easy to digest. You can drink some rice porridge, millet porridge, rotten noodles, these foods are relatively high in water content, which can help promote the recovery of the cold, and will not increase the burden on the gastrointestinal tract, and the calorie is also relatively high, which can promote the recovery of the cold. You need to eat more fresh fruits and vegetables rich in vitamins and fiber, such as apples, grapefruit, oranges and tomatoes, which are particularly high in vitamin C and can enhance resistance. In addition, you can eat green vegetables, such as cabbage or radish, these foods have the effect of helping to cure the cold, but also help defecate, excrete excess toxins from the body, reduce the appearance of indigestion.