Adults who have frequent colds are mostly suffering from Qi deficiency from the perspective of Chinese medicine. At this time, you can improve your immunity and prevent the frequent occurrence of colds through dietary therapy and taking some medicines. You can choose to eat a diet of brightly colored vegetables and fruits, and you can also eat more nuts such as walnuts, peanuts and pistachios under the premise of balanced nutrition. Also take more milk, soy milk, eggs and other high-protein foods, including lean meat, beef, chicken breast, duck breast, etc. In addition, you can also take Chinese medicines that enhance immunity and have the effect of supporting the righteousness, such as Yu Ping Feng granules, Tonic Zhong Yi Qi granules, Cordyceps sinensis, etc.