Zack, Green Tea will indeed help raise metabolism - it's been proven. It will also help keep you healthy. GT lowers cholesterol, it's a powerful anti oxidant, anti arthritic, anti fungal and anti carcinogenic.

To get the metabolism boosting effect you do need to drink between 7 -10 cups a day, and that is of the caffinated variety. You should double that if you're using decaf (a lot of tea, I know). You can add splenda to your tea, or lemon if you like, but if you use milk it will negate a lot of the teas' benefitical properties.

If the idea of 10 cups of tea is too much for you, you can take the extract of the tea in pill form. 1 pill usually equals 7-10 cups, and the bonus is the extract doesn't have to be caffinated. You do have to ensure that the pills are standardized to 60% polyphenols, however.

There are many posts about the benefits of GT in the Nutrition / Supplements forum if you're interested.

Cheers,
Nat