Walk down the functional drinks aisle today and you'll find everything from kombucha to prebiotic sodas promising to support your gut. While they're often grouped together, they aren't actually doing the same job.
Short answer: Kombucha and prebiotic soda support gut health in different ways. Unpasteurised kombucha may provide live probiotic cultures, while a prebiotic soda supplies fibre that feeds the beneficial bacteria already living in your gut. Neither is universally "better"—they're complementary rather than competing.
Understanding that difference makes choosing the right drink much easier.
What Is Kombucha and How Does It Support Gut Health?
Kombucha is a fermented tea made by adding a SCOBY (Symbiotic Culture of Bacteria and Yeast) to sweetened tea and allowing it to ferment over several days or weeks.
During fermentation, the microorganisms convert some of the sugar into organic acids, carbon dioxide and a small amount of naturally occurring alcohol. Exactly how much sugar remains depends on the fermentation time and manufacturing process.
Commercial kombucha varies significantly from brand to brand, but there are three things worth knowing.
1. Alcohol content
Because kombucha is fermented, it naturally contains small amounts of alcohol. Commercial products are generally kept below 0.5% ABV so they can be sold as non-alcoholic beverages, although homemade or longer-fermented kombucha can occasionally contain more.
2. Live cultures depend on processing
The probiotic benefit of kombucha comes from its live microorganisms—but only if they're still alive.
Unpasteurised (often labelled "raw") kombucha retains these live cultures. Pasteurisation, which improves shelf stability, significantly reduces or eliminates them. Two bottles labelled "kombucha" can therefore offer very different probiotic potential.
3. Sugar content varies
Fermentation reduces sugar, but doesn't necessarily remove it completely.
Depending on the brand and fermentation process, commercial kombucha commonly contains anywhere from 2–10g of sugar per serving.
Is Kombucha Actually Good for Gut Health?
Kombucha has become closely associated with gut health, but it's worth understanding what the evidence actually says.
Raw kombucha contains live microorganisms, and fermented foods have long been part of healthy dietary patterns around the world. However, relatively few human clinical studies have directly examined kombucha's effects on gut health. Much of its reputation comes from what we know about fermented foods more broadly rather than kombucha specifically.
That doesn't mean kombucha isn't a good choice—it simply means the research is still evolving.
How a Prebiotic Soda Supports Gut Health Differently
Hadō works through a completely different mechanism.
Rather than introducing live bacteria, Hadō is a prebiotic soda that contains 10g of prebiotic fibre from inulin and fructooligosaccharides (FOS) in every can.
Prebiotics are fibres your body doesn't digest. Instead, they become food for the beneficial bacteria already living in your gut, helping them grow and thrive.
Hadō also contains zero added sugar, using monk fruit to provide sweetness instead.
Prebiotics vs Probiotics: What's the Difference?
Although they're often mentioned together, prebiotics and probiotics aren't the same thing.
| Prebiotics | Probiotics |
|---|---|
| Fibre that feeds beneficial gut bacteria | Live microorganisms |
| Found in foods like chicory root, onions, garlic, bananas, and FOS/inulin | Found in yoghurt, kefir, raw kombucha and other fermented foods |
| Help nourish your existing gut microbiome | Introduce live microorganisms into the gut |
Both can play an important role in supporting a healthy gut.
Why This Isn't an Either/Or Comparison
If your goal is better gut health, it's less useful to think of kombucha and prebiotic soda as competitors.
When unpasteurised, kombucha may provide live microorganisms. A prebiotic soda provides the fibre those beneficial bacteria use as nourishment.
Rather than competing, they support different parts of the same system.
Many nutrition experts therefore recommend including both fermented foods and prebiotic-rich foods as part of a balanced diet, rather than relying on only one.
Prebiotic Soda vs Kombucha: Which Should You Choose?
The answer depends on what you're looking for.
Choose kombucha if you:
- Want a fermented beverage with live cultures (choose raw or unpasteurised varieties).
- Enjoy the tart, fermented flavour.
- Don't mind that sugar levels vary between brands.
Choose a prebiotic soda like Hadō if you:
- Want a meaningful dose of prebiotic fibre (10g per can).
- Prefer zero added sugar.
- Want a consistent, measured amount of fibre in every serving.
For many people, there's no need to choose one over the other—they can easily fit into the same overall eating pattern.
Frequently Asked Questions
Does kombucha contain alcohol?
Yes. Because it's fermented, kombucha naturally contains small amounts of alcohol. Commercial kombucha is typically kept below 0.5% ABV so it can be classified as a non-alcoholic beverage.
Is all kombucha probiotic?
Not necessarily. Only unpasteurised (raw) kombucha reliably retains live bacterial cultures. Pasteurised kombucha may still be sold as kombucha but usually contains far fewer, if any, live microorganisms.
Which has more sugar, kombucha or Hadō?
Commercial kombucha typically contains 2 - 10g of sugar per serving, depending on the brand and fermentation process. Hadō contains zero added sugar, using monk fruit for sweetness.
Can I drink both kombucha and a prebiotic soda?
Yes. They support gut health in different ways. Kombucha may provide live microorganisms, while prebiotic drinks supply fibre that feeds beneficial gut bacteria.
Is kombucha healthier than soda?
Compared with traditional sugary soft drinks, kombucha often contains less sugar and may provide beneficial compounds from fermentation. However, sugar content varies widely between brands. A prebiotic soda with zero added sugar and meaningful prebiotic fibre offers a different nutritional profile, so the better choice depends on your dietary goals.
Is kombucha safe for everyone?
Most healthy adults can enjoy kombucha in moderation. However, because it contains small amounts of alcohol and, in raw varieties, live microorganisms, pregnant or breastfeeding women, young children and people with compromised immune systems should consult a healthcare professional before consuming it regularly.