The immune system of the body is boosted by the activities of antioxidants and minerals. Minerals have long been known to be beneficial for the immune system, as they stimulate white blood cell production and activity. Traditionally, fruits like pears have been suggested to eliminate simply conditions like the common cold and coughing that a quick immune system boost could help cure.
Health experts acknowledge the fact that onion provides great benefits for patients with common cold-related coughs and cold syndromes. According to Peace Health, onions have long been useful for treating various human ailments such as persistent coughs and colds.