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DigestionWeak evidence

Kombucha

Also known as: tea fungus, kombucha starter (SCOBY)

Kombucha is a fermented sweetened tea made with a symbiotic culture of bacteria and yeasts (SCOBY). It contains organic acids, tea polyphenols and live microorganisms, but human studies are almost non-existent.

What it is used for

  • support of digestion and gut flora – weak evidence, good human studies are lacking
  • antioxidant compounds from tea – weak evidence for health benefit

Forms and how they differ

starter (SCOBY + starter liquid)

for home brewing; needs cleanliness and an acidic environment

ready-made drink

sugar and live culture content vary by producer

When to take it

With or between meals; start with a small glass.

Pairs well with

A varied diet with fermented foods (kefir, sauerkraut).

Do not combine / separate

Do not brew in glazed ceramic or metal containers – the acid can release lead or metals.

Watch out for

Not suitable during pregnancy, breastfeeding, with weakened immunity or for small children; it contains traces of alcohol and caffeine. With diabetes watch the residual sugar. During pregnancy or breastfeeding, with kidney or liver disease, or when taking medicines, consult your doctor.

Safety

Homemade kombucha can become mouldy – discard it if in doubt. Its acidity may harm tooth enamel.

Practical tip

Use a glass jar and always add enough starter liquid so the brew is acidic from the start.

Products containing Kombucha 1

KombuchaSCOBY culture liquidDigestion & gutAntioxidant
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence

Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.

Combination check

Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.

Check Kombucha with others

Which supplements do you actually need?

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From the same group

Acacia fibreWeak evidenceActivated charcoalModerate evidenceAloe veraWeak evidenceApple fibreModerate evidenceArtichokeWeak evidenceBetaine HClWeak evidence
Important notice

This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.