Does Kombucha Have Caffeine? Here's How Much

Does kombucha have caffeine? Yes, in most cases, because it’s brewed from tea. Brands commonly report about 8–25 mg per serving, compared with 113–247 mg in 12 oz of brewed coffee. Figures vary widely online because tea type, brew strength, and each brewer’s recipe all differ.

Below, you’ll find how much caffeine kombucha typically holds, what raises or lowers it, who may want to keep track, and how to find lower-caffeine options. We’ll also cover bottle sizes and label details that most guides skip.

Key Article Findings

Most kombucha contains some caffeine because it’s made from true tea (Camellia sinensis).
Brands often report about 8–25 mg per serving, well below brewed coffee and usually below a cup of tea.
Tea type, brew strength, bottle size, and added ingredients such as yerba mate change the total.
Labels rarely list milligrams, so the brand’s website is often the best place to check.

Why Most Kombucha Contains Caffeine

Kombucha contains caffeine because it’s made from tea from the Camellia sinensis plant: black, green, white, or oolong. Fermentation doesn’t create caffeine, and it doesn’t reliably remove it either. So most tea-based kombucha has some caffeine, usually much less than coffee.

Kombucha starts as sweetened tea, which a culture of bacteria and yeast then ferments for days or weeks. That process changes the flavor, acidity, and sugar content, but the tea itself stays in the drink. So when people ask if kombucha has caffeine, the more useful follow-up is how much ends up in the bottle.

The Caffeine Comes From the Tea Base

The tea brewed at the start is the only natural source of caffeine in kombucha. The bacteria and yeast feed mainly on sugar and don’t produce caffeine of their own. That means the final amount depends mostly on which tea the brewer chose, how much of it went into the pot, and how long it steeped before the culture was added.

Is Kombucha Caffeinated if It’s Made With Herbal Tea?

It may not be. Some kombucha-style drinks use rooibos, hibiscus, or other herbal bases, which are naturally caffeine-free. Traditional kombucha is brewed from Camellia sinensis, and a 2024 integrative review notes that herbal substrates can be fermented on their own or combined with true tea. Others brew with decaf tea, which lowers caffeine without removing all of it. Unless the label says “caffeine-free,” assume a little caffeine is present.

How Much Caffeine Is in Kombucha?

Brands commonly report about 8–25 mg of caffeine per 8–12 oz serving. That range comes from brand testing rather than an independent survey, so individual bottles can land above or below it.

Independent figures are scarce. A 2016 laboratory analysis measured about 39 µg/mL of caffeine in black tea kombucha, which works out to roughly 14 mg per 12 oz and sits inside the brand range. Bottle size matters too: many U.S. bottles hold 16 oz and list two servings, so the whole bottle can carry about twice the per-serving figure.

Caffeine in Kombucha vs. Other Drinks

Drink	Serving	Approximate caffeine	Source
Kombucha (tea-based)	8–12 oz	About 8–25 mg	Brand-reported
Green tea	12 oz	About 37 mg	FDA
Black tea	12 oz	About 71 mg	FDA
Brewed coffee	12 oz	113–247 mg	FDA
Decaf coffee	8 oz	2–15 mg	FDA
Herbal “kombucha-style” drink	Any	0 mg if no true tea is used	Label

What That Means for Your Daily Caffeine

For most healthy adults, kombucha adds only a small amount to the daily total. The FDA cites 400 mg a day as an amount not generally linked to negative effects in healthy adults, and two servings at the high end of the brand range (about 50 mg) would be roughly one-eighth of that.

Sensitivity varies widely from person to person, though. If you’re curious how this small dose relates to the lift people describe after a bottle, see our guide on kombucha and energy.

What Changes the Caffeine in Kombucha

The caffeine in kombucha shifts with the tea, the recipe, and anything added after the first fermentation. That’s the main reason caffeine estimates for kombucha disagree so much online. Two bottles labeled simply “kombucha” can be made in very different ways.

Labels don’t always help. U.S. rules require added caffeine to appear in the ingredient list, but brands don’t have to state how many milligrams a drink contains, and caffeine that comes naturally from tea rarely gets a number. Three factors do most of the work.

Tea Type and Brew Strength

Black tea usually contributes more caffeine than green or white tea, as the FDA figures in the table above show for black and green tea. Longer steeping and more tea per liter raise the total further. Many brewers also make a strong tea concentrate and dilute it before fermenting. That dilution likely explains much of the “about a third of the tea” figure some brands quote.

Does Fermentation Lower Caffeine?

Possibly a little, but it’s not something to count on. Brand claims range from no reliable change to cuts of up to 70%, and none of them cite primary studies. The 2016 lab experiment mentioned above treated caffeine as stable during fermentation and used it as a fixed reference point. The tea you start with remains the better predictor of what’s in the bottle.

Flavorings and Added Caffeine

Flavorings can move the number in either direction:

Lower per serving: juice, fruit, or herbs added during a second fermentation dilute the tea base.
Higher: “energy” or cola-style flavors may add yerba mate, green coffee extract, or guayusa, each with its own caffeine.

Hard kombucha is a separate alcoholic product with its own considerations, so it falls outside this guide.

Who Should Keep an Eye on Kombucha’s Caffeine

Most healthy adults don’t need to track the caffeine in a bottle or two of kombucha closely. A few groups may want to pay more attention, either because their caffeine limits are lower or because kombucha’s other traits, such as trace alcohol, acidity, and live cultures, deserve a second look. For these readers, kombucha and caffeine are best considered alongside everything else they drink in a day, including coffee, tea, and soda.

Pregnancy and Breastfeeding

The American College of Obstetricians and Gynecologists considers less than 200 mg of caffeine a day unlikely to be a major factor in miscarriage or preterm birth, a position reaffirmed in 2023. The FDA suggests talking with a healthcare provider if you’re pregnant, trying to conceive, or breastfeeding. Raw kombucha’s trace alcohol and live cultures are separate reasons to check first, and our look at whether kombucha is good for you covers both traits.

Caffeine Sensitivity and Sleep

People who sleep lightly or feel jittery or anxious after caffeine may notice even the small amount in kombucha. In a small sleep study of 12 healthy adults, 400 mg of caffeine taken six hours before bed cut measured sleep time by more than an hour, and participants didn’t notice the change. Kombucha delivers far less, but drinking it earlier in the day and choosing smaller servings may still help.

Children

The Dietary Guidelines for Americans advise avoiding drinks that contain caffeine for children younger than 2. For older children, caffeine isn’t the only question: raw kombucha can carry trace alcohol, and the drink is quite acidic. Both are good reasons to ask your child’s healthcare provider before offering it, and to keep portions small if you do.

How to Choose Lower-Caffeine Kombucha

A few label checks and simple swaps can bring the caffeine down, or close to zero if you need it there:

Check the label or the brand’s website. Many brands don’t list caffeine because testing it requires lab analysis.
Choose green or white tea bases over black tea.
Skip “energy” or cola-style flavors made with yerba mate, coffee, or guayusa.
Try a caffeine-free herbal kombucha-style drink if you need zero caffeine.
Drink smaller servings, earlier in the day, and check how many servings a bottle holds.

If you brew at home, the tea you start with shapes more than caffeine, and our roundup of the best tea for gut health compares common choices.

A No-Brew Kombucha Option

If you like kombucha but want more control over your serving, Gut Kombucha offers a different format. It’s an instant, non-carbonated powder made with InstaKOMBU™ oolong tea kombucha, so there’s no brewing, no fizz, and no bottles to keep cold. Mix one 4 g scoop into 8 oz of cool water for a drink formulated to help support a balanced gut microbiome.

PureHealth Research Gut Kombucha supplement banner

It’s vegan-friendly, gluten-free, soy-free, and dairy-free. Oolong tea naturally contains caffeine, so check the label and ask your healthcare provider if you’re tracking intake.

Conclusion

Kombucha and caffeine go together because the drink is brewed from tea, but a typical serving holds far less caffeine than coffee and usually less than a cup of tea. The exact amount depends on the tea base, brew strength, bottle size, and flavorings, so the label and brand website are your best guides. If you’re sensitive, choose lighter teas, skip energy-style flavors, and enjoy it earlier in the day, or try Gut Kombucha for a brew-free option.

Is kombucha caffeinated enough to replace coffee?

Not for most people. A typical serving holds about 8–25 mg of caffeine, while 12 oz of brewed coffee can hold 113–247 mg. If you rely on coffee for caffeine, kombucha will feel much milder.

Does green tea kombucha have less caffeine than black tea kombucha?

Usually, yes. Green tea tends to contain less caffeine than black tea, so kombucha brewed from it typically starts lower. Brew strength and steeping time still matter, so a strong green tea batch can outpace a weak black one.

Does homemade kombucha have more caffeine than store-bought?

It can. Homemade batches aren’t lab-tested, and stronger tea or longer steeping raises caffeine. Store-bought kombucha is often diluted or blended with juice, which may bring the caffeine per serving down.

Is there caffeine in kombucha powder?

Usually, if it’s made from true tea. Gut Kombucha, for example, uses oolong tea kombucha powder, and oolong naturally contains caffeine. Check the label or ask the brand for exact amounts.

Does kombucha have alcohol as well as caffeine?

Yes, in trace amounts, since fermentation produces some alcohol. In the U.S., kombucha with 0.5% alcohol by volume or more is regulated as an alcoholic beverage, and levels can rise if fermentation continues in the bottle.

Can the caffeine in kombucha interact with medications?

It may. The liver enzyme that processes caffeine also handles several medicines, and some of them slow caffeine’s breakdown. If you take any prescription, ask your pharmacist or healthcare provider how kombucha fits into your routine.

U.S. Food and Drug Administration. (2024, August 28). Spilling the beans: How much caffeine is too much?

https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much

Barros, V. C., Botelho, V. A., & Chisté, R. C. (2024). Alternative substrates for the development of fermented beverages analogous to kombucha: An integrative review. Foods, 13(11), Article 1768.

https://www.mdpi.com/2304-8158/13/11/1768

Miranda, B., Lawton, N. M., Tachibana, S. R., Swartz, N. A., & Hall, W. P. (2016). Titration and HPLC characterization of kombucha fermentation: A laboratory experiment in food analysis. Journal of Chemical Education, 93(10), 1770–1775.

https://pubs.acs.org/jceda8/article-abstract/93/10/1770/785095/Titration-and-HPLC-Characterization-of-Kombucha?redirectedFrom=fulltext

American College of Obstetricians and Gynecologists. (2010). ACOG Committee Opinion No. 462: Moderate caffeine consumption during pregnancy. Obstetrics & Gynecology, 116(2, Pt. 1), 467–468.

https://www.ovid.com/jnls/greenjournal/fulltext/10.1097/aog.0b013e3181eeb2a1~committee-opinion-no-462-moderate-caffeine-consumption

Drake, C., Roehrs, T., Shambroom, J., & Roth, T. (2013). Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine, 9(11), 1195–1200.

https://link.springer.com/article/10.5664/jcsm.3170

U.S. Department of Agriculture & U.S. Department of Health and Human Services. (2020). Dietary guidelines for Americans, 2020–2025 (9th ed.).

https://www.dietaryguidelines.gov/

Alcohol and Tobacco Tax and Trade Bureau. (n.d.). General TTB requirements [Kombucha].

https://www.ttb.gov/regulated-commodities/beverage-alcohol/kombucha/general-requirements

Carrillo, J. A., & Benitez, J. (2000). Clinically significant pharmacokinetic interactions between dietary caffeine and medications. Clinical Pharmacokinetics, 39(2), 127–153.

https://link.springer.com/article/10.2165/00003088-200039020-00004

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Laura Kraujalyte

Author

Laura is a wellness writer with a BA in Advertising Management who focuses on holistic living and the everyday habits that support a balanced life. She brings a thoughtful, reader-first approach to clear, reliable health content shaped by her passion for nourishing food, mindful movement, and time in nature.

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