My brother drinks Green Tea like all the time. Someone had told my mom if he keeps drinking it, that his colon will turn black.

Is that true?

I'm a moderator, not a doctor. But here's a great website where you can type in searches for all kinds of medical questions.

http://www.webmd.com

I wouldn't think there's any real harm in decaffinated green tea. It contains antioxidants, and it's basically a steaming cup of swampwater. (I'm not a big fan of hot teas, I'll admit it. )

There's some medical debate on whether or not there's measurable health benefits to green tea, but I've never seen anything that suggested it would be harmful.

Brian