- Kombucha is marketed as a health drink, a fermented tea with a signature vinegary flavor
- The drink -- around for thousands of years -- is popular with health food enthusiasts
- Federal regulators warn fermented concoction might need to be moved to liquor store
Denver (CNN)Ed Rothbauer broke his back years ago and was paralyzed from the ribs down. Today, he walks with a cane. It's a recovery he attributes, in part, to what he believes is a healing tea called kombucha.