Green tea is known to have many properties that can help keep you in tip-top health - and therefore better prepared to ward off cold and flu bugs. The jury is out on how many cups of tea are optimal, but 2-3 per day are often recommended. If you do come down with cold or flu symptoms (or feel them coming on), consider 3-4 cups of green tea per day to expedite ridding your body of those nasty bugs and give your body's defenses an extra jolt.