Kombucha

Safety Status: Avoid Entirely

Kombucha is an unpasteurized fermented beverage that must be strictly avoided during pregnancy.

While it has gained popularity for its probiotic benefits, the combination of raw fermentation, potential pathogens, trace alcohol, and caffeine makes it unsafe for expectant mothers.

The primary food safety concern with kombucha is the lack of pasteurization.

Kombucha is made by fermenting sweetened tea using a symbiotic culture of bacteria and yeast (SCOBY). Because heating the drink would kill the live cultures, commercial and home-brewed kombuchas are almost always sold raw.

Unpasteurized beverages carry a high risk of contamination by Listeria monocytogenes and other harmful bacteria.

Listeriosis is a severe infection that can cross the placenta, leading to miscarriage, stillbirth, or life-threatening infections in newborns.

Secondary Risks: Alcohol and Caffeine

Kombucha poses two additional risks for pregnant individuals:

• Trace Alcohol Content: Alcohol is a natural byproduct of yeast fermentation. While commercial kombuchas are tested to remain under 0.5% ABV, home-brewed versions can have significantly higher levels. Because there is no known safe limit for alcohol during pregnancy, even trace levels present risks.
• Caffeine Content: Kombucha is brewed using black or green tea, meaning it contains caffeine. While the fermentation process reduces caffeine slightly, it still contributes to your daily 200 mg limit.
• Lactic and Acetic Acid: Raw kombucha contains high levels of acids that can worsen pregnancy heartburn or stomach sensitivity.

Safe Probiotic Alternatives

If you are drinking kombucha for gut health, you can safely get probiotics from these alternatives:

• Pasteurized Yogurt or Greek Yogurt: Made with pasteurized milk and contains active, safe cultures.
• Pasteurized Kefir: A fermented milk beverage that is pasteurized and highly rich in probiotics.
• Probiotic Supplements: Speak to your OB-GYN or midwife about taking a clinically tested, high-quality prenatal probiotic supplement.
• Pasteurized Fermented Foods: Choose pasteurized sauerkraut or kimchi, ensuring they have been heated to destroy pathogens.