Can i drink green tea everyday even in high quantities ?

YES: Green tea is produced by lightly steaming the freshly cut leaf, while black tea is made by allowing the leaves to oxidize.The major polyphenols in green tea are catechin,epicatechin,epicatechin gallate,epigallocatechin gallate & proanthocyanidins. Green tea is not associated with any significant side effects nor toxicity except monitor the caffeine amount. Prevention of cancer & many chronic disea

Green Tea effects: I understand your concern about drinking green tea every day in high quantities. Single doses of up to 1.6 grams (about 4 cups) of green tea extract are well tolerated. One can take up to 8cups/day of Green Tea. If you are caffeine sensitive, you may get headache, dizziness, irritability, upset stomach and nausea. Taken with stimulant drugs, green tea may increase Blood Pressure.