What foods can boost immunity?

Immunity is an effective defense against external invaders such as bacteria and viruses. The best way to enhance immunity is through a healthy diet that meets all the body's essential nutritional needs. It is advisable to moderately increase intake of foods rich in vitamin C and vitamin E, which can boost cellular immune function and resistance, such as vegetables, fruits, and legumes. Additionally, consuming foods rich in vitamin A and calcium can promote the development and function of the immune system; examples include fish, milk, and eggs. Moreover, eating ample dietary fiber (such as whole-grain products) helps improve immunity. Unsaturated fatty acids found in nuts, seeds, and soybeans also contribute to enhanced immune function. Furthermore, people may consume certain herbal plants, immune-modulating substances, and antioxidants—such as ironweed, citronella, and sweet wormwood—to strengthen the body's immunity. In summary, the most important factor in boosting immunity is maintaining balanced eating habits, supplementing nutrients in a rational manner, and engaging in regular physical exercise.