Properly prepared homemade chicken soup is good medicine. It is the first thing I think of making when I or my loved ones are under the weather. Research has shown that chicken soup does help to fight colds and the flu. Various compounds in chicken soup boosts immune function, clears congestion and lowers inflammation. The water, salt and gelatin in the broth also help to keep the body hydrated. This soup recipe calls for parsley in the broth thereby raising the Vitamin K level to 163% per serving. Vitamin K also helps boost immune function.