Why is Kombucha Carbonated? A Bubbly Guide to Your Favorite Fizzy Drink

Kombucha, a fermented tea beverage, has gained popularity in recent years for its potential health benefits and tangy, refreshing taste. One of the most captivating aspects of kombucha is its natural fizziness, which sets it apart from other beverages. In this article, we’ll explore the reasons behind kombucha’s carbonation and discuss how you can achieve the perfect level of fizz in your homemade kombucha.

Quick Answer

  1. Kombucha is a carbonated drink that gets its fizziness from the natural fermentation process involving a symbiotic culture of bacteria and yeast.
  2. Carbonation in kombucha can be influenced by factors like fermentation time, temperature, sugar content, and bottle quality.

Table of Contents

Is Kombucha Carbonated?

Yes, kombucha is a carbonated drink. The natural carbonation in kombucha occurs during the fermentation process, thanks to the yeast and bacteria present in the symbiotic culture of bacteria and yeast (SCOBY). These microorganisms break down sugar in the sweet tea, producing carbon dioxide and giving kombucha its characteristic fizziness.

Why is Kombucha Carbonated and How is Kombucha Naturally Carbonated?

Kombucha’s carbonation results from the fermentation process involving the SCOBY. As the yeast consumes sugar, it produces carbon dioxide gas as a byproduct. The bacteria in the SCOBY also contribute to kombucha’s carbonation by converting ethanol, another byproduct of yeast fermentation, into acetic acid and other organic acids.

Yeast’s Role in Carbonation

Yeast is a type of fungus that metabolizes sugar and converts it into energy through fermentation. During this process, yeast cells break down the sugar molecules and produce ethanol and carbon dioxide gas as byproducts.

Bacteria’s Role in Carbonation

While the yeast is responsible for generating carbon dioxide and ethanol, the bacteria in the SCOBY play an essential role in kombucha’s fermentation. The bacteria convert the ethanol produced by the ferment of yeast into acetic acid and other organic acids, giving kombucha its characteristic sour taste. Some bacteria can also produce small amounts of carbon dioxide, contributing to the overall carbonation of the beverage.

Is There Non-Carbonated Kombucha?

Yes, non-carbonated kombucha exists, typically called “flat kombucha.” Flat kombucha can result from a lack of carbon dioxide production during the fermentation process or the release of carbon dioxide during storage. Some people may even prefer the taste of flat kombucha over its fizzy counterpart. While carbonation can enhance the drinking experience, kombucha without carbonation is still a nutritious and enjoyable beverage.

Comparing Kombucha’s Carbonation to Other Fizzy Drinks

Kombucha’s carbonation is distinct from other effervescent beverages in several ways:

  • Soda: Carbonation in soda is artificially created by injecting carbon dioxide gas. It usually has a more intense and less refined fizz compared to kombucha. Additionally, soda often contains higher sugar levels and synthetic ingredients, making it less healthy than kombucha.
  • Sparkling Water: Carbonation in sparkling water is also artificially added. The effervescence in sparkling water is generally softer than that in soda or kombucha. Sparkling water lacks the distinct flavors and potential health advantages of kombucha due to the absence of fermentation.
  • Beer: Like kombucha, beer acquires its carbonation through natural fermentation. However, beer contains alcohol, whereas kombucha has a minimal alcohol content. Beer and kombucha differ in flavors and fermentation processes, as beer relies on ingredients like barley and hops rather than tea.

How to Know if Kombucha is Carbonated

To determine if your kombucha is carbonated, simply open the bottle and listen for a “hiss” sound, indicating the release of carbon dioxide gas. You can also observe the formation of bubbles in the liquid when you pour it into a glass. If your kombucha is fizzy and bubbly, it’s carbonated.

How to Get More Carbonation Kombucha

To increase carbonation in your kombucha, follow these tips:

Maintain Optimal Temperature:

Keep the fermentation environment between 70°F and 75°F (21°C and 24°C) to promote yeast activity and carbon dioxide production.

Add Extra Sugar or Fruit:

Adding additional sugar or fresh fruit in during secondary fermentation provides the yeast with more sugar to consume, resulting in increased carbonation.

Use Airtight Bottles:

Choose high-quality airtight bottles, such as swing-top bottles or pressure-rated glass bottles, to trap carbon dioxide effectively.

Allow Time for Secondary Fermentation:

Let the bottles sit at room temperature for a few days, typically between 3 and 7 days, to build up carbonation.

Burp the Bottles:

Periodically “burp” the kombucha by opening the bottles and releasing excess carbon dioxide. This helps preventover-carbonation and reduces the risk of bottle explosions.

Addressing Common Carbonation Problems in Homemade Kombucha

  • Lack of Carbonation: If your kombucha is not carbonated enough, consider raising the fermentation temperature, adding extra sugar or fruit during the second fermentation, or allowing more time for the secondary fermentation.
  • Excessive Carbonation: To prevent over-carbonation and potential bottle explosions, periodically release excess carbon dioxide from your kombucha bottles during secondary fermentation by briefly opening them.
  • Inconsistent Carbonation: If your kombucha batches exhibit varying carbonation levels, ensure consistent fermentation conditions such as temperature and sugar content. Keeping a fermentation tracking log may help you identify factors that influence carbonation.

Is Kombucha Still Good Without Carbonation?

Yes, kombucha is still good without carbonation. Although carbonation adds to the taste and drinking experience of kombucha, flat kombucha retains the potential health benefits from the fermentation process. The presence of beneficial bacteria, organic acids, and antioxidants makes flat kombucha a healthy and enjoyable drink.

Factors Influencing Kombucha Carbonation

Here’s a markdown table showing factors that influence kombucha’s carbonation and their effects:

Factor Effect on Carbonation
Temperature Warmer temperatures accelerate fermentation and promote carbonation. Consistent temperature control is vital for achieving desired carbonation levels.
Sugar Content More sugar or added fruit increases carbon dioxide production. Sugar content in the tea and during secondary fermentation can influence carbonation.
Fermentation Time Longer fermentation time can increase carbonation. Primary and secondary fermentation durations can impact carbonation levels.
Bottle Quality Airtight bottles help trap carbon dioxide and maintain carbonation. High-quality bottles, such as swing-top or pressure-rated glass bottles, are recommended.
Type of Tea Different tea types (green, black, white, etc.) can produce varying carbonation levels. Green and white teas may require longer fermentation times to reach optimal carbonation compared to black tea.
Flavorings & Additives Introducing fruit juice or purees during secondary fermentation can enhance carbonation by providing additional sugar for yeast metabolism. Herbs and spices might affect carbonation levels depending on the specific ingredients used. Artificial flavorings and sweeteners are not recommended, as they can disrupt the fermentation process and influence carbonation levels.
Secondary Fermentation Adding extra sugar, fruit, or other flavorings during secondary fermentation can increase carbonation. Allowing time for secondary fermentation, typically between 3 and 7 days, helps build up carbonation. Burping the bottles periodically by opening them and releasing excess carbon dioxide can prevent over-carbonation and reduce the risk of bottle explosions.

By understanding these factors, you can better control the carbonation level in your homemade kombucha.

How Different Tea Types Affect Kombucha Carbonation

  • Green Tea: Green tea typically produces a lighter, more refined kombucha with gentler carbonation compared to black tea. It might need a longer fermentation period to reach the desired carbonation levels.
  • Black Tea: Black tea usually results in a stronger, more intense kombucha flavor with higher carbonation levels. It is the most popular tea choice for brewing kombucha.
  • White Tea: White tea creates a subtle, nuanced kombucha flavor. Similar to green tea, it might require an extended fermentation time to attain optimal carbonation.
  • Other Tea Varieties: Herbal teas, oolong, and other tea varieties can also be utilized for brewing kombucha. Carbonation levels may vary depending on the specific tea type and fermentation conditions.
Kombucha Tea

The Influence of Flavorings and Additives on Kombucha Carbonation

  • Fruit Juice and Purees: Introducing fruit juice or purees during secondary fermentation can enhance kombucha’s carbonation by supplying additional sugar for the yeast to metabolize. Fruit additions also contribute unique flavors.
  • Herbs and Spices: Adding herbs and spices to your kombucha might affect carbonation levels depending on the specific ingredients used. Some herbs and spices can hinder yeast activity, while others may promote it. Experiment with various combinations to find the ideal balance.
  • Additives: Artificial flavorings and sweeteners are generally not advised for kombucha, as they might disrupt the fermentation process and influence carbonation levels.

Pros and Cons of Kombucha Carbonation for Health

  • Advantages: Carbonation can offer positive effects, such as improving the taste and mouthfeel of kombucha. The acidity produced by carbonation may help suppress the growth of harmful bacteria in the beverage.
  • Disadvantages: For some people, excessive carbonation could cause bloating or gas. The acidity in carbonated kombucha might also potentially damage tooth enamel, emphasizing the importance of moderate consumption and maintaining good oral hygiene.

Frequently Asked Questions

Does kombucha have carbonation?

Indeed, kombucha is a carbonated beverage. The effervescence comes from the natural fermentation process, during which the symbiotic culture of bacteria and yeast generates carbon dioxide, giving kombucha its characteristic fizz.

Is the carbonation in traditional kombucha similar to modern kombucha?

Yes, traditional kombucha is also carbonated. The carbonation in both traditional and modern kombucha arises due to the fermentation process. However, the degree of fizziness may vary based on the specific brewing methods and fermentation conditions employed.

Is kombucha meant to be fizzy?

Kombucha is generally intended to have some level of carbonation, as it contributes to the unique flavor and texture of the drink. That being said, the carbonation in kombucha can vary depending on factors like fermentation duration, temperature, and sugar content. People’s preferences for carbonation levels can also differ, with some favoring a less carbonated drink and others seeking extra fizz.

Can I find kombucha without carbonation?

Yes, it is possible to find kombucha without carbonation or “flat” kombucha. Incomplete fermentation or exposure to air, which lets the carbon dioxide escape, can cause kombucha to lose its fizziness. Flat kombucha still possesses potential health benefits, including beneficial bacteria, organic acids, and antioxidants.

Is non-carbonated kombucha still a good option?

Even without carbonation, kombucha remains a beneficial and enjoyable drink. Although the fizziness enhances the taste and overall experience, flat kombucha continues to provide potential health benefits due to the fermentation process. The beneficial bacteria, organic acids, and antioxidants present in flat kombucha make it a healthy choice.


Kombucha is a naturally carbonated beverage resulting from the fermentation process involving the symbiotic culture of bacteria and yeast. Carbonation not only adds to the taste and drinking experience of kombucha but also provides some benefits, such as increased acidity and a stimulating sensation. To enhance carbonation, ensure proper fermentation conditions, use high-quality airtight bottles, and experiment with secondary fermentation techniques.

For more information about kombucha, its origins, and its health benefits, be sure to check out these articles:

By understanding the science behind kombucha’s carbonation and applying the tips and techniques shared in this article, you can enjoy a fizzy, refreshing, and healthy kombucha beverage at home or on the go.