Health Canada's Natural Health Products Directorate has deemed tea to be a natural health product and has officially recognized tea for its role in maintaining good health. After a period of extensive review, the NHPD has approved three health
claims for tea. All types of tea infusions (black, green and oolong) are
recognized as a source of antioxidants for the maintenance of good health. Tea
is approved for increasing alertness. And tea is further accredited as helping
to maintain and/or support cardiovascular health.