kambucha tea

[CAREY WINTERFLOOD]

Hello out there from Bondi beach[australia]
I am searching for info on Kamucha tea with the mushroom.I am currently a 
brewer and consumer but not really knowing much about it.I have the regular 
info on 100 year plus individual from remote clans and tribes of by-gone years 
but what about modern day consumers?
Is there a limit to daily consumption ? Can too much be toxic?Is there any 
scientific proof or has there been any breakdown of its componants ? etc 
etc.Any info would be greatly apprieciated
Peace and smiles
Carey