Does Kombucha Have Caffeine? Per-Bottle Amounts by Brand

Does Kombucha Have Caffeine? Per-Bottle Amounts by Brand

Yes, kombucha has caffeine. Every standard kombucha is brewed from tea, and tea contains caffeine. A typical 16 oz bottle lands between 8 and 30 mg, roughly what you get from a cup of decaf coffee. The exception is KeVita Master Brew, which adds green coffee bean extract and pushes some flavors above 60 mg per bottle. Below is a full brand-by-brand breakdown so you can see exactly what you are drinking.

The Full Kombucha Caffeine Table

Caffeine varies by brand, tea base, and bottle size. The numbers below come from each brand's own packaging or FAQ pages, standardized to the bottle you actually buy.

A few notes on reading this table. GT's lists caffeine per 8 oz serving (4-8 mg for Synergy, 8-14 mg for Classic), so double those numbers for a full 16 oz bottle. Health-Ade states 8-15 mg per serving depending on flavor. Humm lists approximately 14 mg per 8 oz based on its packaging Nutrition Facts panel, which scales to roughly 25 mg for a 14 oz bottle. KeVita is the outlier: its Master Brew line adds caffeine from green coffee bean extract on top of the tea base, so flavors like Ginger clock in around 67 mg per 15.2 oz bottle, while others reach close to 80 mg.

How Kombucha Caffeine Compares to Other Drinks

For context, here is how a typical kombucha stacks up against drinks you probably already know.

Sources: FDA for coffee and decaf benchmarks; USDA FoodData Central for tea values; brand sites for kombucha.

Most kombucha sits below a single cup of green tea. KeVita Master Brew, because of the added green coffee bean extract, enters the territory of coffee's caffeine, for scale. If you are trying to minimize caffeine intake, check which line you are buying.

Why Doesn't Fermentation Remove the Caffeine?

A common assumption is that fermentation "burns off" the caffeine in tea the way cooking burns off some alcohol. The chemistry does not support that.

Caffeine is a stable alkaloid. A 2025 study in Food Science and Human Wellness used a kombucha SCOBY to ferment coffee and found caffeine in one condition remained relatively stable over 24 hours, though this studied coffee rather than tea-based kombucha. Separate research published in Food Chemistry: X notes that fermentation can reduce original tea caffeine by roughly 15-70%, depending on time, temperature, and microbial composition, with some caffeine being transformed into other methylxanthines like theobromine.

So fermentation does reduce caffeine somewhat, but it does not eliminate it. The bigger reason most kombucha reads so low on the label is simpler: brewers steep a relatively weak base tea and then dilute it before fermentation begins. The low number is mostly a function of recipe, not microbial magic.

Is Kombucha Caffeine Free?

No. Because kombucha starts as brewed tea, every standard kombucha contains some caffeine. The only way to get a truly caffeine-free kombucha is to brew it from an herbal tisane like rooibos instead of Camellia sinensis tea. A handful of brands offer rooibos-based versions, but the six major grocery-store brands in the table above all contain measurable caffeine.

If your goal is to stay under a certain daily caffeine ceiling, the FDA's general guidance for healthy adults is 400 mg per day. Even three bottles of GT's Synergy in a single day would not get you to 50 mg.

Does Kombucha Have Alcohol?

Yes, in small amounts. Fermentation produces trace alcohol as a natural byproduct. Under federal law (TTB), any kombucha at or above 0.5% alcohol by volume at any point during production, bottling, or after bottling is classified as an alcohol beverage and subject to federal alcohol regulation. Most commercial kombuchas are brewed to stay under that 0.5% ABV line and are sold as non-alcoholic.

The catch: kombucha is alive. If a bottle warms up on a shelf, fermentation can resume and push ABV higher. That is why some brands carry warnings about refrigeration. If you are avoiding alcohol entirely for medical, religious, or personal reasons, read labels carefully and keep bottles cold.

Will Kombucha Keep Me Awake?

Probably not, unless you are drinking KeVita Master Brew late at night or you are extremely sensitive to caffeine. A standard 16 oz bottle of GT's Synergy delivers 8-16 mg of caffeine, roughly half a cup of decaf. For most people, that amount clears the body quickly and is unlikely to affect sleep. For reference, here is how a 10 mg dose behaves in the body.

KeVita Master Brew is a different story. At 68-80 mg per bottle depending on flavor, it sits close to a full cup of coffee. Drinking one of those after dinner could push your bedtime caffeine high enough to matter.

Can You Drink Kombucha at Night?

For most brands, yes. A 10-25 mg caffeine load at 8 PM is not going to keep the average adult awake at midnight. The carbonation might bother your stomach more than the caffeine bothers your sleep. KeVita Master Brew is the exception worth flagging: treat it the way you would treat a cup of coffee and stop well before bed.

The Bottom Line on Kombucha and Caffeine

Kombucha is not caffeine-free, but for most brands it is close. The typical bottle delivers 8-30 mg, which is decaf-coffee territory. KeVita Master Brew is the outlier that drinks more like a light coffee. Fermentation reduces but does not eliminate the caffeine already present in the base tea, and the low final numbers owe more to dilute brewing than to microbial breakdown. Check the label, know your brand, and you will know exactly what you are getting.

Frequently Asked Questions

How much caffeine is in GT's kombucha?

GT's Synergy line contains about 4-8 mg of caffeine per 8 oz serving (8-16 mg per 16 oz bottle). The Classic line runs higher at 8-14 mg per 8 oz serving (16-28 mg per bottle) because it uses a heavier tea base with both black and green tea. Both are well below a standard cup of coffee at ~95 mg. GT's describes its products as "naturally decaffeinated."

How much caffeine is in Health-Ade kombucha?

Health-Ade states its kombucha contains 8-15 mg of caffeine per serving, depending on flavor. That puts a full 16 oz bottle at roughly 16-30 mg, comparable to a cup of decaf coffee. Health-Ade brews from a blend of green and black tea.

Is kombucha caffeine free?

No. All kombucha brewed from real tea (Camellia sinensis) contains some caffeine. Most brands fall in the 8-30 mg per bottle range. The only genuinely caffeine-free option is kombucha made from herbal teas like rooibos, which a few specialty brands offer.

Does kombucha have alcohol?

Yes, in trace amounts. Fermentation produces small quantities of ethanol. The TTB classifies any kombucha at or above 0.5% ABV as an alcoholic beverage. Most commercial brands stay below that threshold and are sold as non-alcoholic.

Why does KeVita Master Brew have so much more caffeine?

KeVita Master Brew adds caffeine from green coffee bean extract on top of the caffeine already present from the tea base. This is listed in the ingredients panel. Depending on the flavor, a 15.2 oz bottle can contain anywhere from about 68 mg to 80 mg of caffeine, far more than other kombucha brands.

Can I drink kombucha while pregnant?

This falls outside the scope of a caffeine chart. While kombucha's caffeine content is low, the drink also contains trace alcohol and live cultures. Talk to your clinician before adding kombucha to your routine during pregnancy.

Does the type of tea in kombucha change the caffeine?

Yes. Black tea starts with more caffeine (~47 mg per 8 oz brewed) than green tea (~28 mg per 8 oz), so a black-tea-base kombucha will generally end up with more caffeine than a green-tea-base version, all else being equal. GT's Classic (black and green tea blend) versus GT's Synergy (green and black blend) is a clear example of this pattern.

Is kombucha a good source of caffeine for energy?

Not really. At 8-30 mg per bottle, most kombucha delivers less caffeine than a single cup of green tea. If you are drinking kombucha for a functional caffeine boost, you are buying the wrong drink. An 80 mg option with no fermentation involved would be a more direct route.

When 15 mg Is Not the Point

If you found this article because you are trying to figure out whether kombucha counts as a caffeine source, the honest answer is: barely. Most bottles sit between a cup of decaf and a cup of green tea. That is not a performance dose; it is background noise.

For people who actually want caffeine to do something, the math changes. Roon is a zero-nicotine oral pouch that delivers 80 mg of caffeine alongside 60 mg of L-theanine, 25 mg of methylliberine (Dynamine), and 5 mg of theacrine (TeaCrine). The methylliberine slows caffeine clearance: a randomized, double-blind crossover PK study (n=12) found co-administration of methylliberine with caffeine cut caffeine's oral clearance from 41.9 to 17.1 L/hr and extended its half-life from 7.2 to 15 hours, with no increase in peak concentration. That study used 100 mg methylliberine + 150 mg caffeine, roughly 4x the methylliberine and 1.9x the caffeine in a Roon pouch, so the exact magnitudes do not translate directly. But the mechanism is directionally the same, and Roon's felt window runs 6-8 hours on a single pouch. The trade-off: stop at least 8 hours before bed.

Kombucha is a fine drink for flavor, probiotics, or a light ritual. It is not a caffeine tool. If you want a caffeine tool that actually lasts, Roon starts at $9.16 per tin on a 12-tin subscription. Zero sugar, zero nicotine, 15 pouches per tin.

Related from Roon

• How Much Caffeine Is in a Cup of Coffee?
• How Long Does Caffeine Stay in Your System?
• Does Matcha Have Caffeine?
• How Much Caffeine Is in a Focus Pouch? Is 80 mg Too Much?

Written by Roon Team