Flavonoids.

Red wine contains vital cold-defeating flavonoids. What are flavonoids exactly? I'm glad you asked. Flavonoids, which are found in plants, are metabolites that have antioxidant properties. In other words, they help prevent your body from succumbing to illnesses, like nasty summer colds. According to a study by the University of Auckland,NZ, drinking red wine can significantly reduce the risk of catching colds.