Key findings
- 1SCOBY fermentation is a 2,000+ year-old process and is one of the oldest food preservation methods known to humanity
- 2The fermentation process naturally produces organic acids, B vitamins, and beneficial bacteria without any industrial additives
- 3Raw, unflavored kombucha is the simplest commercial version; juice-flavored versions add a step, and both are far simpler than any soda or energy drink
- 4In our analysis, commercial kombucha averages a Processing Score of 3.8, which is Level 2
Why is Kombucha Level 2 on average?
Kombucha fermentation is a biological process, not an industrial one. A SCOBY, a living mat of Acetobacter bacteria and various yeasts; consumes the sugar in sweetened tea over 7-14 days, producing organic acids (acetic, glucuronic, lactic), B vitamins, enzymes, and trace amounts of alcohol (typically 0.5% or less). This is the same category of ancient fermentation as yogurt, sauerkraut, and wine. The key distinction in commercial kombucha is what happens after fermentation: some brands (GT's) keep it raw and relatively pure, while others add fruit juice, sugar, artificial flavors, or pasteurize it (which kills the beneficial cultures). Pasteurized kombucha with added flavors is more processed, but even these remain far simpler than most commercial beverages. In our analysis, kombucha averages a Processing Score of 3.8, which is Level 2.
How 898 kombucha products break down
Share of products at each processing level, in our analysis.
Kombucha brand comparison
From least to most processed in our database.
How to read a kombucha label
- 1
Raw, unpasteurized kombucha contains live cultures; the primary benefit of fermentation
- 2
Check for added sugar after fermentation; some brands add sweetener back to make it more palatable
- 3
First-fermented-only brands (GT's Original) are the simplest commercial versions
- 4
Pasteurized kombucha has killed the live cultures; it is fermented tea without the probiotic benefit
Ketzal for iPhone
Got Kombucha At Home?
Scan yours in Ketzal to see how your exact product scores, not just the average, plus a less processed swap.
Scan It Free
Frequently asked questions
Is store-bought kombucha as good as homemade?
Raw, unpasteurized store-bought kombucha (like GT's) contains live cultures similar to homemade. Pasteurized or heavily flavored commercial versions have fewer benefits. The processing is similar for simple raw brands, but homemade gives you full control over ingredients and fermentation time.
Does kombucha actually have health benefits?
Raw kombucha contains live beneficial bacteria (probiotics), organic acids, and B vitamins produced naturally during fermentation. These are real compounds, not marketing claims. However, the specific health impacts vary by individual and the science is still evolving.
Is hard kombucha more processed?
Hard kombucha (with higher alcohol content) undergoes a longer or modified fermentation. Some brands add additional sugar and yeast strains, which adds to the processing. It is still far less processed than beer or wine coolers.