Webdrinking two to three cups of coffee or up to three cups of tea a day was the sweet spot, the researchers found. People who consumed about 200 to 300 milligrams of caffeine daily had a lower risk. Webdon't try to cut the line to quench your thirst by asking a barista for your water. Stay in the queue patiently and wait your turn to order, even for this free amenity. A morning cup of coffee may do more than just perk you up, according to new research. Moderate amounts of caffeine intake — defined as one to three cups. Compared with nonconsumers or consumers of less than.