Can you drink kombucha while pregnant?

No human study has tested whether kombucha is safe during pregnancy. The concerns are trace alcohol from fermentation, caffeine from the tea, and the microbial risk of unpasteurised or home-brewed kombucha. So the most cautious approach is to pause kombucha while pregnant and talk it through with your doctor or midwife.

Below we summarise, without scaremongering and without giving you a green light, what reputable sources say, why each risk factor matters, and what applies while breastfeeding.

Kombucha during pregnancy: what do the sources say?

There is no scientific basis for a firm yes or no. Here is what we do know:

• Research is very thin. A systematic review of kombucha’s effects on human health found only one empirical study in humans among hundreds of publications, and none in pregnant women (Kapp & Sumner, Annals of Epidemiology, 2019).
• MotherToBaby, a US service of teratology specialists who advise on exposures in pregnancy and breastfeeding, says that not drinking kombucha for the nine months is the best way to avoid unnecessary alcohol exposure, and that pasteurised, shop-bought kombucha is the safer choice for anyone who does drink it (MotherToBaby).
• University of Georgia Extension notes that kombucha may not be suitable for people with compromised immune systems, pregnant women or children, and advises consulting a healthcare professional (UGA Extension / NCHFP).
• The CDC states there is no known safe amount of alcohol and no safe time to drink alcohol during pregnancy (CDC).
• The NHS advises no more than 200 mg of caffeine a day in pregnancy and says it is safest to avoid alcohol (NHS).

In short: there is no evidence that kombucha harms a pregnancy, but no evidence that it is safe either, and its known ingredients run into general pregnancy guidance on alcohol, caffeine and unpasteurised food.

Why kombucha needs care in pregnancy

Risk factor	Why it matters	What to do
Trace alcohol	Fermentation produces alcohol. Commercial kombucha is usually under 0.5% ABV, but home-brew is never measured and can be higher. No safe level in pregnancy is known.	The most cautious choice is to avoid it. Steer clear of home-brew.
Caffeine	Kombucha is made from black or green tea, and caffeine varies with the tea and brewing.	Keep total caffeine (coffee, tea, cola, chocolate included) within the limit your doctor recommends.
Unpasteurised product	Live, unpasteurised drinks carry a risk of bacteria such as Listeria and Salmonella if hygiene slips.	Avoid home-brew and unlabelled products; if you want to drink kombucha, discuss it with your doctor.
Home-brew contamination	At home, pH, temperature and hygiene usually aren’t measured, which raises the risk of mould or unwanted microbes.	Home-brewed kombucha is not recommended during pregnancy.
Acidity	Kombucha is acidic and may worsen the heartburn and reflux many people experience in pregnancy.	If you have heartburn, ask your doctor about acidic drinks.
Lack of evidence	No studies in pregnant women exist.	Don’t start kombucha in pregnancy because of claimed health benefits.

Alcohol

Kombucha is fermented: yeast turns sugar into alcohol, and bacteria convert part of it into acids. Commercial “non-alcoholic” kombucha is usually below 0.5% ABV, but not zero. MotherToBaby points out that bottled products have been recalled when fermentation continued after bottling, and that home-brew can reach 3% or more. For the full picture, read is kombucha alcoholic, and is it halal?.

Caffeine

The caffeine comes from the tea. MotherToBaby cites a rough range of 15–130 mg depending on the tea used. That wide range is exactly why knowing the label or recipe matters. For typical numbers, see kombucha sugar, caffeine and calories.

Unpasteurised and home-brewed kombucha

Live kombucha contains living yeast and bacteria. When it is made properly its low pH protects it, but lapses in hygiene or fermentation control can let unwanted microbes grow. Foodborne infections can be more serious in pregnancy, which is why health bodies are generally cautious about unpasteurised products. Pasteurisation reduces that risk but does nothing about alcohol or caffeine.

Kombucha in the first trimester

There is no separate “safe” window in the first three months. The CDC notes that alcohol can affect a baby at any stage of pregnancy, including before someone knows they are pregnant, so the same caution applies in the first trimester.

If you drank kombucha before you found out you were pregnant, try not to worry. Mention it at your next appointment, including how much you drank and whether it was home-brewed or shop-bought. As the CDC also says, it is never too late to stop drinking alcohol.

Kombucha while breastfeeding

The picture is a little different once your baby is born, but care is still sensible:

• Alcohol: the CDC says not drinking alcohol is the safest option while breastfeeding, and that waiting at least 2 hours after a single standard drink before nursing is safest (CDC). Kombucha contains far less alcohol than a standard drink; MotherToBaby says an alcohol-free kombucha is unlikely to harm an infant, while waiting a couple of hours gives the body time to clear it.
• Caffeine: caffeine passes into breast milk and can make some babies irritable or disturb their sleep. You may not need to cut it out completely, but limiting total intake is recommended.
• Home-brew: because its alcohol and caffeine are unknown, a labelled commercial product is the more predictable option while breastfeeding too.

If your baby was born prematurely or has health problems, ask your paediatrician specifically about caffeine and alcohol.

What to ask your doctor or midwife

Having these details ready makes the conversation quicker:

1. Is the kombucha shop-bought or home-brewed?
2. Is it pasteurised or live (unpasteurised)?
3. Does the label give alcohol content and caffeine?
4. How much do you drink, or want to drink, per day or week?
5. What other caffeine sources do you have during the day?

We look at what is and isn’t known about kombucha’s health effects in kombucha benefits and side effects. It’s worth repeating that there is no evidence of specific benefits of kombucha in pregnancy.

What to drink instead

If you miss something tangy and fizzy, plain sparkling or mineral water with a few slices of lemon, cucumber or fresh mint is a simple swap. Diluted homemade lemonade or freshly squeezed juice topped up with sparkling water works too. Don’t assume herbal teas are automatically safe because they are “natural”: some herbs are not recommended in pregnancy, so check those with your doctor or midwife as well.

The bottom line

No safe amount of kombucha in pregnancy has been established. The most cautious approach is to pause it while pregnant, avoid home-brew in particular, and make the breastfeeding decision together with your doctor or midwife.

The kombucha we brew in Fethiye is live and unpasteurised, so we don’t recommend it specifically for pregnant women. If you or your doctor need product details such as tea type, alcohol or caffeine, get in touch and we’ll gladly share what we have.

This article is general information, not medical advice.