The onion is from the allium family and is rich in sulfur providing the onion with its antibiotic and antiseptic properties. Onion is also extremely high in antioxidant Querectin which helps the body to fight free radicals.
Natural Cures. Respiratory conditions respond well to onion juice as it is a great expectorant. Onions are good for cholesterol levels, heart, arthritis, a great antioxidant, and good for diabetes due to its flavonoid and sulfur compounds. Onions have been used as a standard treatment for thousands of years.'