KeVita Master Brew kombucha has more caffeine: 76mg per 15.2 oz bottle against 47mg per 8 oz cup, a gap of 29mg. Measured by concentration the order is reversed, at 5.9mg per fl oz versus 5mg.
KeVita Master Brew kombucha vs brewed black tea: the numbers
| KeVita Master Brew kombucha | Brewed black tea | |
|---|---|---|
| Caffeine per serving | 76mg per 15.2 oz bottle | 47mg per 8 oz cup |
| Caffeine per fl oz | 5mg | 5.9mg |
| Servings to reach 400mg | 5 | 9 |
| Source | Caffeine Informer | USDA FoodData Central |
Both figures were checked against their source before this page went up: KeVita Master Brew kombucha against Caffeine Informer (source) and brewed black tea against USDA FoodData Central (source). Brewed drinks and cocoa foods vary by batch, so published figures are averages rather than guarantees.
What the gap means in practice
KeVita Master Brew kombucha is doing the real work here. The practical question is not which number is bigger but whether brewed black tea is small enough to ignore in your day: at 47mg per 8 oz cup you would need 9 servings to reach the 400mg reference point, against 5 for KeVita Master Brew kombucha.
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Caffeine in this category is a label question, not a marketing one: browse kombucha on Amazon and read the nutrition panel before you buy a case.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- KeVita Master Brew kombucha: the full caffeine breakdown
- Brewed black tea: the full caffeine breakdown
- Does decaf have caffeine? Every decaf drink ranked
- Hidden caffeine: the foods and drinks people forget to count
- The verified caffeine database
- Compare any two drinks side by side
FAQ
Does KeVita Master Brew kombucha or brewed black tea have more caffeine? KeVita Master Brew kombucha, at 76mg per 15.2 oz bottle against 47mg per 8 oz cup for brewed black tea.
How much caffeine is in KeVita Master Brew kombucha? 76mg per 15.2 oz bottle, which works out to about 5mg per fl oz. The figure comes from Caffeine Informer.
Is brewed black tea caffeine free? No. Brewed black tea carries 47mg per 8 oz cup. It is a small amount, but small is not the same as none.
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