What makes kombucha special as a fermented tea drink?
Kombucha is a fermented tea drink made with a community of bacteria and yeasts. During fermentation, some of the sugar is metabolized, and the characteristic sweet-tart taste develops.
Depending on the kombucha culture, tea, and production process, different organic acids and other fermentation products are formed.
In raw, unpasteurized kombucha, live cultures can also remain in the finished drink.
How is kombucha made?
Kombucha is made using a culture of yeasts and bacteria added to sweetened tea. During fermentation, the microorganisms metabolize components of the tea and the added sugar. In the process, organic acids and other natural fermentation products can be formed.
The amount of sugar remaining in the kombucha depends on several factors, including the original recipe, the culture, the temperature, and the duration of fermentation. The sugar content is therefore not the same in every kombucha and can also remain relevant after fermentation.
A base of black or green tea is often used for production. With the right experience, other suitable tea varieties can also be tried. You can find out more about this in our post on the selection of the right tea for kombucha fermentation.
What does research on kombucha investigate?
Kombucha is a complex fermented drink. Depending on the raw materials, microorganisms, and production process, organic acids and various metabolic products can be formed during fermentation, among other things.
In scientific studies, these components and fermented foods in general are investigated, among other things, in connection with metabolism, the microbiome, and digestive processes. However, the results vary considerably depending on the study design, the product investigated, and the group of people.
Therefore, no generalized health effects of kombucha can be derived from this research. Kombucha is particularly interesting as an example of how microorganisms biochemically change tea and sugar during fermentation.
Sources and further reading:
(1) Hessmann-Kosaris, A.: Natürlich gesund mit Kombucha, Augsburg, 1999.
(2) Hannah Crum, Alex LaGory: The Big Book of Kombucha, 2016.
Kombucha in brief
Kombucha is made by fermenting sweetened tea with yeasts and bacteria. In the process, the characteristic sweet-tart aroma and various fermentation products develop. The remaining sugar content and the composition of the finished drink depend on how it is made. Scientific research continues to investigate kombucha and its components; so far, no generalized statements about health effects for all people have emerged from this.
Frequently asked questions about kombucha fermentation
What ingredients do you need for kombucha?
Traditional production is based on tea, sugar, a kombucha culture of yeasts and bacteria, and suitable starter liquid. The exact quantities and conditions influence the course of fermentation.
Is the sugar completely broken down during kombucha fermentation?
No. During fermentation, some of the sugar is metabolized by the microorganisms. The amount of sugar remaining in the finished drink depends on the recipe and production conditions.
What substances are formed during fermentation?
Depending on the culture and production conditions, organic acids and other metabolic products can be formed, among other things. Their composition and concentration vary between different kombucha batches.
Is unpasteurized kombucha always rich in live cultures?
Unpasteurized kombucha can contain live yeasts and bacteria. However, the actual amount and composition depend on how it is made and stored. Unpasteurized also does not automatically mean that a drink has a proven probiotic effect.
Share: