Raw kombucha is never heated after fermentation, preserving the live probiotics, beneficial bacteria, and natural enzymes produced during brewing. Pasteurised kombucha is heated to 70°C or above, which kills these living cultures to extend shelf life. The key difference: raw kombucha is alive, pasteurised kombucha is not.
What Is Raw Kombucha?
Raw kombucha is fermented tea that has never been pasteurised or heat-treated after brewing. The fermentation process — which takes 7-14 days — produces a living ecosystem of bacteria and yeast (known as a SCOBY) that converts sweet tea into a tangy, naturally carbonated drink packed with probiotics.
Because raw kombucha is never heated, all of these living organisms survive in the final product. When you drink raw kombucha, you are consuming billions of live probiotic bacteria that can colonise your gut and support your digestive health.
Raw kombucha must be kept refrigerated at all times. The cultures inside are still alive and active — if left at room temperature, fermentation continues, the flavour becomes more vinegary, and carbonation can build up.
What Is Pasteurised Kombucha?
Pasteurised kombucha has been heated after fermentation to kill the live cultures. This process — named after Louis Pasteur — heats the liquid to at least 70°C for a sustained period, destroying bacteria, yeast, and enzymes.
The result is a shelf-stable product that can sit at room temperature for months without changing flavour or building pressure. This makes it much easier and cheaper to distribute through traditional retail channels — supermarkets, convenience stores, and vending machines.
Most of the kombucha you find on supermarket shelves in South Africa has been pasteurised. Look for brands stored at room temperature (not in the fridge) — this is the clearest indicator.
The Key Differences
| Factor | Raw Kombucha | Pasteurised Kombucha |
|---|---|---|
| Live probiotics | Yes — active cultures | No — killed by heat |
| Shelf life | 2-3 months (refrigerated) | 6-12 months |
| Storage | Must be refrigerated | Room temperature |
| Taste | Complex, evolving, tangy | Consistent, milder, sweeter |
| Gut health benefit | Maximum probiotic benefit | Reduced or none |
| Carbonation | Natural fermentation | Often force-carbonated |
| Price | Typically R27-R35/bottle | Typically R20-R30/bottle |
| Best for | Health-focused consumers | Casual drinkers |
Why Does Pasteurisation Kill Probiotics?
The bacteria and yeast in kombucha are living organisms. Like all living things, they cannot survive extreme heat. When kombucha is heated above 70°C during pasteurisation, the cell walls of these microorganisms break down and the organisms die.
This is the same reason we cook food to kill pathogens — heat is effective at destroying microbes. The difference is that in kombucha, the microbes are the beneficial part. Pasteurising kombucha is like buying a plant and then cutting off the roots.
How to Tell If Your Kombucha Is Raw
Use this simple checklist next time you are shopping:
- Check the fridge. If it is on a regular shelf at room temperature, it is pasteurised.
- Read the label. Look for "raw", "unpasteurised", or "contains live cultures."
- Look for sediment. A light cloudiness or small strands at the bottom is a good sign — that is living culture.
- Check the expiry date. A short shelf life (2-3 months) indicates raw. A long shelf life (6-12 months) indicates pasteurised.
- Feel the bottle. If it needs to be kept cold and the label says "keep refrigerated," it is likely raw.
The South African Kombucha Shelf
In South Africa, most mainstream kombucha brands sold in Woolworths, Checkers, and Pick n Pay are pasteurised for shelf stability. This makes commercial sense — refrigerated distribution is expensive and complex, especially in a country as large as South Africa.
But a growing number of small-batch producers — including us at Kickass Kombucha — are committed to keeping it raw. We believe that if you are drinking kombucha for gut health, you should be getting the real thing: living cultures that can actually make a difference.
Our kombucha is brewed in Mtunzini, KwaZulu-Natal, fermented for 7-14 days, and shipped chilled to your door. Every bottle contains the full spectrum of living probiotics, organic acids, and enzymes that nature intended.
Which Should You Choose?
If you are drinking kombucha primarily for gut health and probiotic benefits, choose raw every time. The live cultures are the entire point.
If you enjoy the taste of kombucha as a refreshing drink but are not focused on probiotics, pasteurised kombucha still offers organic acids and antioxidants from the tea base — and it is more convenient to store.
Our recommendation? Try both and taste the difference. Once you have had raw kombucha, it is hard to go back.