How Safe Herbal Tea

 

The Natural Medicines Comprehensive Database gives green tea a rating of “likely safe” when used as a beverage in moderate amounts, as “possibly safe” when used as an extract for up to 6 months, as “possibly unsafe” for long-term use in high doses due to its caffeine content, and as “likely unsafe” when used orally in very high doses. It reports a long list of adverse reactions including liver failure. It reports a long list of interactions with other supplements and with drugs, and warns that green tea may worsen symptoms of various diseases.