Experts believe that soup can alleviate symptoms occurring as a result of the flu or common cold. It is believed that the positive effect of soup is because it is consumed hot, so when you lean over it to eat you will feel better and be able to breathe easier. Others feel that the effect is emotional – that someone cooked soup and take care of you, can instantly make you feel better. Moreover, the soup is fluid and increases hydration of the body. Anyway, hot soup helps.