About 20% adults and 50% children with asthma can induce or aggravate asthma due to improper diet. There are many kinds of this kind of food, which varies from person to person, among which milk, eggs and fish are the most common. If it is confirmed that the patient is allergic to one of the foods, it should be avoided. On the contrary, there is no need to overemphasize taboos to avoid malnutrition and low resistance.

When choosing non-staple food, elderly patients with asthma should pay attention to supplement protein, increase the intake of vitamins A and C, and eat more foods that can eliminate phlegm, relieve asthma and moisten the lungs. Asthma in the elderly is mostly induced by decreased resistance and colds, and vitamin C can improve the body's resistance to infectious diseases and harmful external factors, and promote the formation of antibodies in the body. Vitamin C is mostly found in some fresh vegetables and fruits. Vitamin A can maintain the health of epithelial cells and tissues, which is of great value in preventing asthma attacks. Vitamin A is found in liver, protein, cream and butter. In addition, lilies, fungus, loofah, bamboo shoots, radishes, fresh lotus seeds, lotus roots, oranges, oranges, walnuts, pears, honey, kelp and so on. It has certain expectorant, antiasthmatic, antitussive and lung moistening effects, and can be used as auxiliary preventive and therapeutic food.

In addition, due to the large consumption of asthma patients in protein, in order to compensate protein and enhance resistance, when they are not allergic to certain foods, they can choose to eat eggs, milk, lean meat, livestock, soybeans and bean products. But fat meat, shrimp and crabs are not suitable for eating. There are also irritating foods such as peppers and onions that are not suitable for eating and irritating drinks such as strong tea, wine and coffee. It is worth noting that many food additives such as nitrite and tartar yellow added to orange juice and soda water may induce asthma attacks in some patients.