What is the effect of tea polyphenols on hepatic drug metabolising enzymes?

Paracetamol is one of the most widely used, studied, and arguably the most notorious hepatotoxic drugs, which is safe at therapeutic doses but causes liver failure when overdosed. When administered at normal doses, paracetamol is metabolised extensively by conjugation with sulphate and glucuronic acid. Exposure to high doses of paracetamol results in increased levels of N-acetyl-p-benzo-quinoneimine (NAPQI), a highly electrophilic metabolite that is considered to be responsible for triggering the ensuing liver damage...

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