It's true, chicken soup is a legitimate remedy for cold and flu symptoms: "Chicken soup mildly reduces congestion. In Chinese medicine, spicy hot soups are recommended to treat upper respiratory infections to promote mucus drainage," says Camelia Davtyan, M.D., director of women's health at the UCLA Comprehensive Health Program. Likewise, "If you prefer a fish or vegetable broth, the results are much the same. It's just that chicken soup is the all-time favorite," says Nakayama. Whether you make one from scratch or from a can, add extra vegetables to give your body the vitamin support it needs when your immune system is down.