Pancreatic cancer: One observational study found that drinking five or more cups of green tea per day was linked to a decreased risk of pancreatic cancer ( 22).Breast cancer: Two observational studies showed reduced recurrences of breast cancer in women who drank more than three cups of green tea daily ( 20, 21).Stomach cancer: Another large observational study showed a reduced risk of stomach cancer in women who consumed five or more cups of green tea per day ( 19).Prostate cancer: A large observational study found that men who drank five or more cups of green tea daily had a lower risk of developing prostate cancer, compared to those who drank less than one cup per day ( 18).Oral cancer: In a large observational study, women who drank three to four cups of green tea daily were the least likely to develop oral cancer ( 17).However, the optimal amount to drink may depend on the disease. Green tea may help lower the risk of several diseases. Some studies show health benefits in people who drink as little as one cup per day, while other studies deem five or more cups per day to be optimal ( 15, 16). Studies that explore the benefits of green tea show conflicting evidence about exactly how much you should drink each day. Summary: The compounds in green tea can have powerful effects on health, including a decreased risk of cancer, diabetes and heart disease. Other possible benefits of drinking green tea include immune system support, improved brain function, improved dental health and a lower risk of arthritis, Alzheimer’s and Parkinson’s disease ( 12, 13, 14). Overall, studies indicate that consuming green tea can help you burn an additional 75–100 calories per day ( 11).Īlthough this may seem like a small amount, it can contribute to significant weight loss over the long term. The caffeine and catechins it contains have been shown to boost your metabolism and increase fat burning ( 9, 10). What’s more, several studies indicate that green tea may lower your risk of developing type 2 diabetes and heart disease ( 5, 6, 7, 8).Īnd drinking green tea may even help you lose weight. The cancers that green tea may help protect against include prostate and breast cancer, which are the two most common cancers in men and women, respectively ( 3, 4). In fact, multiple studies show that people who drink green tea are significantly less likely to get many types of cancer, compared to those who don’t drink it ( 1, 2). This includes potent antioxidants called catechins, which may help protect against cancer. Green tea is loaded with nutrients and plant compounds that can have positive health effects.
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