Green and white teas are known to contain the highest concentration of health-promoting antioxidants. In 2001, the World Health Organization determined that men and women of Japan enjoyed the longest “Healthy Life Expectancy” in the world. Scientists have long associated this longevity with, in part, the Japanese people’s regular consumption (often over 10 cups a day) of tea.* Researchers at the Saitama Cancer Center Research Institute reported in 2000 that people who drank more than ten cups a day of tea experienced significantly better heart and immune system health than those who drank under three cups a day.*