It's my understanding that the fizziness of kombucha is due to carbonic acid production from the fermentation process.
Whenever I ingest ANYTHING that's carbon-ated - even champagne or sparkling apple juice - I get horrible bloating and an eventual headache, which I assume is air pressure on various nerves.
I'm now allowing my kombucha to "air out" in an open glass for several hours before drinking it so that it's flat when I drink it.
Is this diminishing the effectiveness of the kombucha to do this aeration?