I thought so also, but the only "scientifically" backed research I could find on kombucha didn't agree with all the great things we hear about Kombucha. The caffeine was still present and the vitamin B's along with the probiotics and several other things were not present like you read about when you "research" kombucha.
I didnt stop drinking it because of that, I do believe it has health benefits I just wish there was more research out there on it.