Kombucha is like wine: there is the really good one, the mediocre one and then the one that is way down on the shelf.
Really good kombucha is traditionally fermented , is not pasteurized or filtered, contains only natural ingredients, little sugar and no sweeteners. It is usually produced by small manufacturers who specialize only in kombucha. Really good kombucha is often significantly more expensive than the standard version due to the long fermentation times , a lot of manual work and the use of high-quality ingredients , but you get a real quality product .
In the middle price and quality segment , traditional fermentation is sometimes used, but kombucha concentrates are often used to speed up the production process. The products are often heavily filtered to increase shelf life and flavorings are used to intensify the taste at lower costs. If the kombucha is particularly cheap, you can assume that it was produced industrially. When making cheap kombucha, tea is usually simply mixed with a kombucha concentrate and not fermented any further. To compensate for the lack of the characteristic kombucha taste, these products are usually heavily sweetened or covered with flavorings. In addition, they are almost always pasteurized and filtered and therefore no longer contain any living microorganisms .