LiverTox is a data base to check on liver toxicity of supplements. I looked up green tea (see the small field at the top "Search: enter a drug name").
Niacin, comfrey, Kava and even green tea in high doses can cause liver injury. A Loyola liver specialist praises the new LiverTox free online database of drugs and explains acetaminophen is just one of many drugs taken that negatively impacts liver health.
I learned that drinking green tea is safe. Only high doses of green tea extract pose a hazard, and most people recover rapidly when they stop taking it, "...although fatal instances of acute liver failure have been described."
I read that article and I am glad that I am not taking any of those.
Good to hear. You can always ask me about supplements - I'm always researching them too.
I stopped taking acetaminophen when I heard this years ago. I now take Ibuprofen and aspirin.
Niacin is the one that worries me because my old doctor has had me on Niaspan for several years to raise my good cholesterol. I'm going to ask my new doctor for his opinion as my cholesterol is not bad and I've never had heart trouble. My blood pressure readings are always good.
The relevant LiverTox section on green tea is
Human clinical studies demonstrate that single doses of up to 1.6 grams of green tea extract are well tolerated. The maximum tolerated dose in humans is reported to be 9.9 grams per day; a dose equivalent to 24 cups of green tea. Side effects of high doses of green tea extract are usually mild and include headache, dizziness and nausea. The safety and tolerability of long-term use of green tea extracts has not been well defined.