The immune system of the body is also boosted by the activities of antioxidants. Antioxidants have long been known to be beneficial for the immune system, as they rid the body of harmful toxins. Traditionally, fruits like pears have been suggested to eliminate conditions like the the flu, or various other mild illnesses that a quick immune system boost could help treat.
Capsaicin stimulates secretions, which helps to clear the mucus from the nose and lungs by clearing the sinuses and causing sweating. Historically, if a person is congested in the nose or chest/lungs, some extra cayenne has been added to their food. Tea mixed with cayenne pepper is also traditionally believed to be good for treating conditions of the flu.