A prospective investigation was conducted on 4923 Japanese patients with type 2 diabetes to determine the impact of consuming green tea and coffee on their overall mortality. Camellia sinensis (green tea) contains various chemicals such as phenolic acids that are antioxidants, anti-inflammatory and anti-bacterial. Similarly, coffee contains numerous bioactive chemicals that also act as antioxidants and anti-inflammatories. After a median of 5.3-year follow-up (with a 99% follow-up rate), researchers found that the consumption of green tea, coffee and a combination of both beverages were associated with reduced all-cause mortality. (values are per day) Just Green tea: –15% for less than 1cup; –27% for 2-3cups; –30% for over 4 cups / Just Coffee: –12% for less than 1 cup; –19% for 1 cup; –41% for over 2 cups / Combo: –51% for 2-3 cups of tea plus 2 or more cups of coffee; –58% for over 4 cups tea plus 1 cup of coffee; –63% for over 4 cups of tea plus 2 or more cups of coffee. Combining both green tea and coffee brought additive effect with a relative risk reduction of mortality greater : the study reports a 63% lower risk of mortality for a combination of 4 or more cups of green tea with 2 or more cups of coffee every day, as compared to 41% reduced mortality when just consuming 2 cups of coffee per day, or 30% when just consuming 4 cups of green tea per day.