Yes, a little. Rudy's Kombucha is brewed from green tea, and green tea contains caffeine, so some carries through into the can. We do not publish a measured caffeine figure, because none of our certificates carries one. Cold Brew Coffee & Orange also contains coffee, and Matcha & Passion Fruit contains matcha.
The base is green tea, so every can carries some caffeine from the tea.
No certificate states a measured caffeine figure, so we publish none.
Kombucha is fermented tea. The certificates list green tea in the kombucha culture itself, described as water, green tea and a SCOBY. Whatever caffeine the tea brings is carried into the finished drink. Fermentation does not remove it.
Why there is no number here
The ingredients and quality certificates behind these answers declare energy, fat, carbohydrate, sugars, fibre, protein, salt and vitamins. None of them declares caffeine. Rather than guess from a generic figure for green tea, we say only what we can stand behind: the caffeine comes from the tea, and we have not measured it. If that changes, the number appears here with its source.
The two flavours with something extra
Cold Brew Coffee & Orange is built on cold brew coffee as well as the tea. Matcha & Passion Fruit uses an infusion of Japanese matcha green tea powder as the base for its culture. Both bring more caffeine to the can than a plain green-tea flavour does.
Which Rudy's flavours contain coffee or matcha?
Two. Cold Brew Coffee & Orange is brewed with cold brew coffee on top of the green tea base, and Matcha & Passion Fruit contains matcha, a powdered green tea. Every other flavour gets its caffeine only from the green tea the kombucha is fermented on. We publish no measured figures.
Cold Brew Coffee & Orange is the coffee one.
Matcha & Passion Fruit is the matcha one.
Everything else takes its caffeine from the green tea base alone.
Cold Brew Coffee & Orange
This flavour is built on cold brew coffee alongside the kombucha. It won Best New Product at World of Coffee 2022 and Most Innovative Beverage at GulFood 2022. It is the flavour to skip if you are avoiding coffee.
Matcha & Passion Fruit
The certificate for this one describes the kombucha culture as water, an infusion of Japanese matcha green tea powder, and a SCOBY, with passion fruit juice 7 per cent, plant fibres, fresh mint leaves and steviol glycosides. Matcha is whole green tea leaf ground to powder, so it brings more caffeine than a brewed infusion of the same leaf.
Everything else
Lemon & Ginger, Rhubarb, Pear & Fireweed by Madara Meiere, Raspberry & Basil, Mango & Passion Fruit, Mandarin & Yuzu, Pineapple & Peach, Coconut & Pineapple and Dragon Fruit Mojito are fermented on green tea and carry only what the tea brings. We hold no measured caffeine figure for any of them, so we quote none.
Rudy's Kombucha store homepage: https://rudyskombucha.com/ (Rudy's Brewing Co, independent kombucha brewery in Kuldīga, founded 2019; brewed without stabilisers or colours)
