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Editorial Note: This article deals with general scientific findings on kombucha and not with Kombuchery products. Scientific findings and study results are not automatically transferable to individual foods or products. The article does not replace medical or nutritional advice and is not to be understood as a health-related statement about specific foods or products.

The content is based on scientific literature, publicly available sources, and the author's assessment, and does not claim to be exhaustive. New studies may confirm, supplement, restrict, or refute existing findings. Scientific publications should therefore always be considered in the overall context of the available evidence.

Studies generally refer to the specific conditions, ingredients, microorganisms, dosages, manufacturing processes, and groups of people investigated. The presented results cannot therefore be readily transferred to other foods, recipes, manufacturing processes, or products.

No statements about the effects, properties, or health benefits of specific foods or products can be derived from the information presented.

Health-related claims for foods in the European Union are subject to the applicable legal requirements. The presentation of scientific research is therefore not to be equated with a permissible health-related claim about a food or product.

If you would like to delve deeper into a topic, we recommend consulting the scientific sources linked in the article and other independent specialist literature to gain as comprehensive an understanding as possible of the current state of research.

Kombucha and Alcohol: How Much Alcohol Does Kombucha Contain?

Have you ever wondered why kombucha can contain small amounts of alcohol? The answer lies in fermentation. Yeasts and bacteria convert sweetened tea into kombucha. In the process, organic acids, natural carbonation, and small amounts of alcohol can also be produced.

How is alcohol produced in kombucha? What is the alcohol content? Is there alcohol-free kombucha? And what should pregnant women or parents keep in mind? Here you will find the most important information about kombucha and alcohol – from production to accurately assessing the alcohol content.

Kombucha: The Fermented Tea Drink Explained in Brief

Kombucha is a fermented tea drink made with a kombucha culture. The term SCOBY stands for “Symbiotic Culture of Bacteria and Yeast” and refers to a community of various bacteria and yeasts involved in fermentation.

During fermentation, these microorganisms use components of the sweetened tea for their metabolic processes. In the process, organic acids, carbonation, small amounts of alcohol, and other fermentation products can be produced. Which substances are ultimately contained and in what concentration depends on the culture, the recipe, and the fermentation conditions.

How Is Alcohol Produced in Kombucha?

During kombucha fermentation, yeasts metabolize some of the available sugar. In the process, ethanol and carbon dioxide are produced, among other things.

Certain bacteria in the kombucha culture can further metabolize some of the ethanol produced into organic acids. This interplay between yeasts and bacteria contributes to kombucha’s characteristic sweet-tart taste.

How much alcohol ultimately remains in the drink depends on numerous factors. These include, for example, the culture used, the amount of sugar, the temperature, the oxygen supply, the fermentation time, and storage.

Would you like to ferment your own kombucha? Here you will find our step-by-step guide to making kombucha yourself.

What Is the Alcohol Content of Kombucha?

The alcohol content of kombucha can vary significantly depending on how it is made. This is especially true for homemade kombucha, which means that no general alcohol value can be given based on fermentation time alone.

The culture, recipe, temperature, oxygen supply, sugar content, fermentation time, and storage all influence how much alcohol is produced and how much of it remains in the finished drink.

In commercially produced kombucha, the alcohol content can be monitored through controlled production processes and appropriate analysis. The information provided by the respective manufacturer and the product-specific values are decisive.

Kombuchery Raw Kombucha contains small amounts of alcohol due to the production process and has a maximum alcohol content of 0.5% ABV. Unpasteurized kombucha can continue to ferment during storage. Therefore, it is important to follow the specified storage conditions.

Can Pregnant Women Drink Kombucha?

Kombucha can contain small amounts of alcohol and – depending on the tea used and the production method – caffeine. It is recommended to avoid alcohol during pregnancy.

Since the alcohol content of kombucha can vary, it is advisable to avoid kombucha during pregnancy. If you have questions about a specific product, it is best to discuss them with your doctor.

Individual factors may also play a role during breastfeeding. If in doubt, it is advisable to seek professional advice.

Can Children Drink Kombucha?

When children drink kombucha, it should also be considered that it can contain small amounts of alcohol and, depending on the tea used, caffeine. The actual alcohol content can fluctuate, especially with homemade kombucha.

A general daily maximum amount of kombucha cannot be reliably established for children. Especially for young children, it is advisable to avoid kombucha or discuss the suitability of a specific product with a pediatrician.

Can Kombucha Be Made Without Alcohol?

In classic kombucha fermentation with yeasts, the production of alcohol cannot be ruled out in principle. The amount can be influenced by the culture used, as well as by the conditions during production and storage.

Anyone fermenting kombucha at home should therefore not assume that the drink is alcohol-free. The actual alcohol content cannot be reliably determined by taste, smell, or fermentation time alone. A suitable measurement is required for this.

If you must completely avoid alcohol, you should choose a suitable drink and not rely solely on a self-managed fermentation process.

What Influences the Alcohol Content of Homemade Kombucha?

When fermenting at home, various factors can influence how much alcohol is produced and how much of it remains in the finished kombucha. The most important are:

1. Sugar and Recipe

Sugar is an important component of classic kombucha fermentation and serves as a substrate for the microorganisms involved.

The amount of sugar used influences the fermentation process. However, simply using as little sugar as possible is not a reliable method for achieving a specific alcohol content. Significant changes to the recipe can also affect the taste and fermentation.

2. SCOBY and Kombucha Culture

The composition of the kombucha culture also plays a role. A SCOBY contains a community of various bacteria and yeasts, whose composition can vary from one culture to another.

This means that even with similar recipes, different fermentation processes can occur. However, the later alcohol content cannot be reliably determined by the appearance of a SCOBY.

3. Oxygen and Temperature

Temperature and oxygen supply influence the activity of the microorganisms involved in kombucha fermentation.

A classic kombucha starter is usually fermented in a suitable container with a breathable cover. Temperature, container shape, and oxygen availability can influence the composition of the finished drink.

Anyone who wants to reliably determine a specific alcohol content needs a suitable measurement. It cannot be reliably determined by fermentation time, taste, or recipe alone.

What Is Hard Kombucha?

Kombucha with a significantly higher alcohol content is referred to as “hard kombucha.” Especially in the United States, there are products that are specifically produced and marketed as alcoholic beverages.

Special production methods and yeast cultures can be used for this purpose, enabling a higher alcohol content. Hard kombucha is therefore not comparable to classic kombucha, which contains only small amounts of alcohol.

Frequently Asked Questions About Kombucha and Alcohol

Is Kombucha Healthy?

Kombuchery is our unpasteurized raw kombucha with 2.3 g of sugar and 9 kcal per 100 ml. It contains live cultures from fermentation as well as natural vitamin C from acerola.

Vitamin C contributes to the normal function of the immune system and normal energy metabolism. Vitamin C also helps protect cells from oxidative stress.

However, the fact that a fermented food contains live microorganisms does not automatically mean that a specific effect on the gut, gut flora, or microbiome can be derived from it. The health assessment of a food also depends on its composition and the amount consumed.

When Can You Drink Kombucha?

You can generally enjoy kombucha at different times of the day – with a meal, as a refreshment in between, or as an alternative to classic soft drinks.

Since kombucha is made from tea, it can also contain caffeine depending on the recipe. When you prefer to drink it therefore depends on your personal preferences and individual tolerance.

How Much Sugar Is in Kombucha?

The sugar content of kombucha depends on the recipe and production method. Sugar plays an important role in fermentation because the yeasts and bacteria involved use it for their metabolic processes.

Some of the sugar added is metabolized during fermentation. The amount of residual sugar that remains in the finished drink can vary significantly from one product to another.

Kombuchery contains 2.3 g of sugar per 100 ml, which is around 50% less sugar than conventional soft drinks. You can find the exact nutritional values on the respective product label.

How Many Calories Does Kombucha Have?

The calorie content of kombucha depends especially on the residual sugar content and the other ingredients used.

Kombuchery contains 9 kcal per 100 ml. You can find the specific nutritional values on the respective product label and product page.

What Is a SCOBY?

SCOBY stands for “Symbiotic Culture of Bacteria and Yeast.” It refers to a community of various bacteria and yeasts involved in kombucha fermentation.

The characteristic solid layer of the SCOBY consists largely of a cellulose matrix formed by microorganisms. This is why the colloquially used term “SCOBY” is not entirely biologically correct: It is not a single fungus.

Together with a suitable starter liquid, the kombucha culture is used to ferment sweetened tea. In the process, organic acids, carbonation, small amounts of alcohol, and other fermentation products can be produced.

1 comment

    • Marina
    • December 24, 2021 at 3:00 pm

    Ich habe da ne Frage: ich habe das mit dem Scoby und dem Alkohol nicht verstanden. Mein Scoby macht mir Kefir, den ich ca. 5-6 Tage fermentieren lasse. Leider wird es immer zu sauer, also Essigartig und ich fülle es ab, bediene mich davon, lagere es kühl ( meist hält das so 4-5 Tage) und wenn ich es trinke wird mir leicht schumrig ( ich muss gestehen ich trinke seit 6 Jahren kein Alkohol und bin nichts mehr gewöhnt). Ist mein Scoby jetzt Bakterien technisch nicht mehr einwandfrei, wenn er solche Mengen Alkohol produziert dass ich es spühre? heisst dass es besonders fleissig ist oder dass er es nicht mehr packt? wachsen tut der Scoby wie blöd, das tut. hab auch mal gelesen dass umso länger er abgefüllt ist umso mehr gärt er nach umd bildet noch mehr Alkohol…aber Tag für Tag? wie bei mir 4-5 Tage draussen im kühlen bei 4 grad? ich hoffe du kannst mir helfen. danke dir.

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¹at the time of bottling
²Vitamin C contributes to the normal function of the immune system, normal energy-yielding metabolism, and the protection of cells from oxidative stress.
  • Vitamin C contributes to the normal function of the immune system.
  • Vitamin C contributes to normal psychological function.
  • Vitamin C contributes to normal energy-yielding metabolism.
  • Vitamin C contributes to the reduction of tiredness and fatigue.
  • Vitamin C contributes to the normal functioning of the nervous system.
  • Vitamin C contributes to the protection of cells from oxidative stress.
  • Vitamin C contributes to the regeneration of the reduced form of vitamin E.
  • Vitamin C contributes to normal collagen formation for the normal function of the skin.
  • Vitamin C contributes to normal collagen formation for the normal function of blood vessels.
  • Vitamin C contributes to normal collagen formation for the normal function of bones, cartilage, teeth and gums.
  • Vitamin C increases iron absorption.