Colds are acute upper respiratory tract infections, children eat an apple a day may prevent colds, but the prevention of colds is also related to the usual exercise, the body’s own immunity and other. Apples are rich in dietary fiber, can improve the body’s immunity, but also contains vitamins, trace elements, malic acid and other components to supplement the body’s nutritional needs, children eat an apple a day, although there is a role in preventing colds, but not eat an apple will not necessarily catch a cold. There are many reasons for colds, such as excessive dieting, late nights, and a decline in the body’s immune system, so you can’t prevent colds simply by eating apples. Children eat an apple a day is more appropriate, to prevent colds at the same time can also reduce the occurrence of constipation, children’s growth and development is more favorable.