Green tea damaging to fast?

Hi, I've been reading these forums while I've been doing my first fast. Currently at 5 days and am feeling pretty good.

However, people around me are freaking out a bit, thinking I'm going to die if I dont eat something.

One of them thinks that I should at least drink some green tea, for its healing properties.

From what I understand, the tea will have no positive affect to the fast, possibly even wreck it.

If I have a green tea (just to make them happy) will this spoil the rest of the fast?

My plan is a 10-12 day fast, and wouldnt plan on having too many more green teas after...

thanks,
Dekkar