You May Also Like

Maple Leaves Botox

Scientists deem maple leaves the plant-based solution to wrinkles

Exercising while pregnant: Woman bikes to delivery

“Beautiful Sunday for a bike ride,” says the most overachieving pregnant lady…en route to give birth

Need veggie sandwich ideas? Try this rainbow one

It’s possible to eat a rainbow for lunch thanks to this ultimate veggie sandwich

The Google Fit update doesn't care about steps

Why Google is pivoting away from step-count-based fitness tracking

The rowing version of Peloton wants you to feel like you're on an IRL river

The rowing-machine version of Peloton wants you to feel like you’re on an IRL river

The best time of day to have sex

We know the very best time to have sex…

Probiotics have been linked to brain fog—so should you kick your kombucha habit?


Thumbnail for Probiotics have been linked to brain fog—so should you kick your kombucha habit?
Pin It
Photo: Stocksy/Gillian Vann

A fridge jam-packed with kombucha can’t be a bad thing, right? All those probiotics help keep you healthy both mentally and physically, after all. Well unfortunately, new research has found a potential downside to filling your digestive tract with good bacteria—and it could be the reason you feel a little “off” after sipping on the cult-beloved wellness beverage or popping a probiotic supplement.

In a small study published in the journal Clinical and Translational Gastroenterology, researchers found that for some people, taking probiotics can lead to brain fog, gas, and diarrhea. When 30 participants with brain fog and 8 without were evaluated, both groups were found to experience those not-so-fun gut-centric symptoms. But the major difference between the groups? Every single participant in the brain-fog group had one thing in common: probiotics. And it’s hypothesized that the probiotics might have caused the shift in their mental state in the first place.

According to the researchers, the brain fogginess—which lasted between 30 minutes and a few hours—could have been caused by the gut’s overproduction of D-lactic acid after taking probiotics, which can happen when the good bacteria colonizes inside the small intestine instead of where it’s supposed to be: the colon. When you have too much D-lactic acid, it can seep into your blood steam, leading to D-lactic acidosis—a condition that’s characterized by symptoms consistent with brain fogginess.

“We shouldn’t assume that it’s safe just because you don’t need a prescription.” —gastroenterologist Will Bulsiewicz, MD

When the participants stopped taking probiotics, 85 percent of those who had brain fog ended up feeling back to normal again. And while that’s great for their productivity levels, it’s definitely not the best news for your kombucha obsession. “Indiscriminate use of probiotics for any GI-related issue, I think, is a major problem,” study author Satish Rao, MD, PhD, tells Gizmodo.

But, South Carolina–based gastroenterologist and gut-health expert Will Bulsiewicz, MD, suggests that while these findings are interesting and important, given the sample size of the study, they should be taken with a grain of salt. Or, er, shot of kombucha. “Among thousands of patients seen over 3 years [Dr. Rao] has identified 30 that developed these symptoms. So this is an exceedingly rare finding,” he says.

Basically, Dr. Bulciewicz says the results shouldn’t necessarily lead you to stop using probiotics, but rather to listen to your body and be more cautious of your use of them. “If ‘brain fog’ or any other form of altered mental status starts to set in, the probiotic should be discontinued immediately, and the patient should notify their physician.” He adds that these findings should serve as a reminder that all supplements, natural products, and foods can affect people. “We shouldn’t assume that it’s safe just because you don’t need a prescription.”

So, now might be a good time to try to other wellness beverage options, like matcha or golden milk—and, of course, pay attention to how your body reacts.

Here’s why some probiotics need to be refrigerated. Or, find out how new probiotics might make you an unstoppable athlete.

Loading More Posts...

You May Also Like

How to style your bangs without heat? Super easy

The lazy-girl hack for styling bangs flawlessly, sans *any* heat damage

Alejandra Campoverdi preventative mastectomy

3 generations of women in my family fought breast cancer—and I know I’ll have a preventative mastectomy

10 healthy things Lauren, Lo, Whitney, and Kristin are too busy doing to return to "The Hills"

10 healthy things Lauren, Lo, Whitney, and Kristin are too busy doing to return to “The Hills”

The best time of day to have sex

We know the very best time to have sex…

Add Audible to your list of free workout apps

Get free guided workouts from an audiobook app—i.e., a nerdy runner’s dream come true

Is it advisable to google my symptoms?

You now have researched-backed permission to go ahead and Google that weird rash