The average recommended intake is 2-3 cups of green tea a day.
assitant
Let me see what I can find out.  It seems that one 8 ounce cup of green tea every day can be safe, but the more you drink the more benefits you will get.
assistant
What are the benefits of green tea?
user
From our friends at Harvard, a Harvard.edu article called "The Benefits of Green Tea" mentions that green tea has been shown to have the following benefits:

It can help prevent cancer
It can reduce levels of bad cholesterol
It can help to treat acid reflux
It may help prevent heart disease
assistant
Wow that is a lot of benefits. I like it. How much should you drink?
user