Sipping this warm broth does more than simply soothe when you're under the weather. Chicken soup has anti-inflammatory properties that inhibit the activity of neutrophils, the white blood cells that are released by viral infections like colds, according to researchers at the University of Nebraska Medical Center. While homemade chicken soup has the greatest benefits, store-bought soups also have some protective powers--just watch out for sodium, which canned foods are notoriously high in.