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Frequently Asked Questions

All About Our Kombucha

What is kombucha?

Kombucha is a fermented tea that is brewed using water, tea, sugar and a kombucha culture of bacteria and yeast. During the fermentation process the yeast transforms the sugar into alcohol and then the bacteria changes the alcohol to acetic acids. This leaves the brewed tea low in residual sugar (depending on fermentation time) with a distinct tart flavour and slight natural fizziness.

What is a SCOBY?

SCOBY is an acronym for Symbiotic Culture Of Bacteria & Yeast or otherwise known as the kombucha culture. together they work to transform sweet tea into kombucha. 

What tea do you use?

We use a blend of tea for our flavoured classic range which is a mix of Japanese Sencha and Oolong green teas. Our Original classic kombucha is a blend with the addition of Ceylon tea. We are always experimenting with new blends and currently have a Rooibos Earl Grey kombucha as part of our specialty blend.

How much sugar is in your kombucha?

As kombucha contains a living culture, we use sugar for the ferment. The brew is fermented for an average of two to three weeks and then bottled. Our flavoured kombucha being Berry Blitz and Pineapple Zinger has the addition of fruit sugars that re-activates the yeast to produce carbonation but also further ferments to produce a great depth of flavour. At this stage the additional fructose will be converted and sugar levels will decrease. We do not add additional sugar (sucrose) to our classic range of kombucha and therefore will have low residual sugar. Our Booch Spritzers have the addition of our delicious cordials that we make with sugar so these tend to have a higher amount of sugar, although not overly sweet to taste.

I am sensitive to caffeine, does your kombucha have caffeine?

For the most part yes, as we use a blend of Sencha and Oolong green tea in our flavoured kombucha. Our Original flavour is made with Ceylon tea. We do however also have a Rooibos Earl Grey tea kombucha which naturally has no caffeine. It should also be noted that we don't steep our teas for very long and therefore not as much of the caffeine in the tea is extracted so it is likely that the caffeine content is lower than your regular cup of green or black tea.

Where do you source your ingredients?

All our ingredients are sourced locally for the most part. We engage with local companies that supply fruit, roots and herbs. Whilst our tea originates from Japan, China, India and Africa.

What is kombucha good for?

Every batch of kombucha is different and certainly different brands will have different kombucha cultures but there are a number of properties that every batch of kombucha is likely to have: 

1) At least one beneficial yeast, 2) Acetobacter - beneficial bacteria, 3) Gluconic acid which is a pH regulator, and 4) Acetic acid which is an anti-microbial acid that also stabilises blood sugar levels. Most batches of kombucha will contain a pain reliever, an anti-arthritic compound, an anti-spasmodic compound, a liver protective compound and several antibacterial compounds but the levels and blend of these compounds differ from batch to batch.

Is kombucha alcoholic?

Through the process of fermentation, yes, our kombucha and generally all other kombucha brands has some alcohol but it is very small amounts usually between <0.5 to around 1%. As a comparison, beer contains around 4 to 5% alcohol. 

Why do I need to refrigerate the kombucha I have bought?

Whilst our kombucha will not likely go bad, it will continue to change as it is a unpasteurised living tea and will tend to sour over time if left in warm conditions. Also we find that it tastes and feels better on the palate when refrigerated. Not to worry if you have forgotten about your kombucha and it has gone sour, you can always add it to salad dressing and still get all the benefits of a kombucha whilst you tuck into your salad! 

One of the ingredients listed on Berry Blitz is barberries, what are they?

Barberries come from the barberry plant (Berberis Vulgaris), which is a shrub that produces tart red berries. The plant, roots and berries contain berberine which is coveted for its antioxidant benefits and may help manage conditions like acne. The berries have been used in traditional medicine for centuries to treat digestive issues, infections and skin conditions. They are a high source of vitamin C and can be used as an alternative to cranberries without the very bitter aftertaste.

What are the Flavour Profiles under your product descriptions?

The flavour profiles are an aid to help you understand what sort of taste you may experience from the kombucha. It does not describe any additives to the beverage.


What charities do you support?

Our ongoing support is to two charities - Mind and McMillan Cancer Support. We will also make donations to other charities or fundraisers that support environmental causes.

Sustainability & Environment

What are you doing to address sustainability and the environment?

With all our products we aim to reduce our carbon footprint by: 1) offering products i.e. bottles, growlers and packaging that can be reused and refilled. 2) We only use loose leaf tea which is composted. 3) We bulk order ingredients like bottles and sugar to reduce the number of times we get deliveries. 4) Our teabags in our herbal tea products are made from corn fibre and are 100% compostable. 5) We offer a discounted price on a new beverage purchase for every one of our bottles you return to us like for like. Returns can be made directly to us at our market stall or if you're a member and are returning your growler for a refill, you can pop any bottles you may have of ours in the same package. 6) Even our herbal tea packets can be refilled with new teabags at a discounted price.

Can I recycle the bottles?

Our bottles are made of recyclable glass and can therefore be recycled. Even better though if you are able to give the bottles back to us, we will reuse them!

Orders & Shipping

I have just placed an order, when will I receive it?

Depending on stock availability and lead time, usually orders are despatched within 3 working days of payment clearing. You will be notified when an order is ready for despatch and when it is on its way.

General Questions

I am a member, how can I get a refill of my growler?

If you are London based, come find us at a market stall or you can contact us and we'll sort it out for you. We are currently working hard to get refill stations further afield but this is a good few months away, so in the mean time please use the return labels provided to send us your empty growlers and we'll refill them for you.

Which stores can I find your products?

Unfortunately we currently do not stock our products at any retail outlet, bar or pub but we are working on it. In the meantime you can find us at a market in and around London, shop online or contact us directly.

I own a business and have tried your products, how to I get in touch with you to become a stockist?

We are looking for small to medium sized establishments to stock our products. Please contact us on info@kombuchashack.com and let us know who you are and we'll set up a meeting for a taster session and discussion. We look forward to hearing from you!

How do I unsubscribe from receiving your emails?

If you have received an email from us, scroll to the bottom until you see the small print. Click on the unsubscribe option and you will be taken to a confirmation page. Click unsubscribe and you will no longer receive our emails. Please note that you may miss out on any great deals or discounts, news of any new products and updates on any events.

I am a member and have received my personal 10% discount code, can my friend use my code? 

Your personal code is solely for your own use and should not be transferred to a friend. They would need to sign up for membership and obtain their own code. As per the Terms & Conditions of membership if it is discovered that your code has been shared with a non family member, the code will be cancelled and no longer be valid for use.

Have any other questions? Please contact us and we will endeavour to answer your query as soon as possible.