One researcher suggested that people try drinking three or four 8-ounce cups of green tea per day, drinking it continuously throughout the day. Others have suggested that 8-10 cups per day is ok. There are also green tea supplements on the market, purporting to give extra benefits of green tea in more concentrated doses.
But new research and articles are raising a caution to people who drink green tea or use the supplements, since the current research has not determined how much tea is safe for consumptions. This research (published in Clinical Research in Toxicology, vol. 20) has found that ingesting too much green tea, especially in supplement form can cause liver and kidney damage.
Green tea contains polyphenols, the antioxidant compounds in green tea that help rid the body of free radicals (chemical reactive atoms or molecules that damage cells). But this new study found that ingesting too much of these polyphenols causes liver toxicity. This is a higher risk for people who take green tea supplements, because the supplements can contain as much as 50 times the amount of polyphenol as a cup of tea. While even someone who drinks 8-10 small cups of green tea a day will probably be fine, the supplements pose more risk.
Do you drink green tea for the heart health, cancer, or RA benefits? Have you found it beneficial?