You exercise. You avoid junk food. You read nutrition labels. And because you’ve heard that a healthy gut means a healthy body, you take probiotics every morning.
Maybe one capsule isn’t enough, so you buy the one advertising 50 billion CFUs. Then you add probiotic yogurt, kombucha and another “gut health” supplement.
After all, they’re good bacteria. What could possibly go wrong?
Well, this is another example of why being extremely health-conscious doesn’t always make you healthier.
Probiotics are live microorganisms that can provide health benefits in certain circumstances. But here’s something supplement marketing doesn’t always emphasize: more bacteria doesn’t automatically mean more benefit.
When “Good Bacteria” Become Too Much
A fascinating 2018 study investigated people experiencing severe bloating, gas and something they described as brain fog—difficulty concentrating, confusion, impaired judgment and feeling mentally disconnected.
Thirty patients experiencing brain fog were evaluated, and all were taking probiotics. Researchers found that 68% had evidence of small intestinal bacterial overgrowth (SIBO), while 77% had elevated urinary D-lactic acid. After probiotics were discontinued and the patients were treated with antibiotics, brain-fog symptoms resolved in 23 of the 30 patients.
The proposed explanation involved bacteria fermenting carbohydrates and producing D-lactic acid. When excessive D-lactate accumulates, it can produce neurological symptoms.
In other words, something people were taking specifically to improve their health may have been contributing to symptoms that made them feel mentally impaired.
But there’s an important catch.
This study did not prove that probiotics cause permanent brain damage in healthy people. It was a small observational study involving people who already had gastrointestinal symptoms, and other researchers subsequently challenged its conclusions about probiotics and D-lactic acidosis.
That’s exactly why we shouldn’t turn an interesting medical finding into another reason to panic.
The Bigger Problem: “Just in Case” Supplementation
I see a broader lesson here.
We’re living in an age of health optimization. People take probiotics for their gut, multivitamins for “insurance,” magnesium for sleep, vitamin D for immunity and several other supplements because someone online said they should.
Soon, breakfast starts looking like a pharmacy.
Supplements are not automatically harmless because they’re labeled natural. Even probiotics contain biologically active microorganisms. Different probiotic strains can have different effects, and a strain that has evidence for one condition shouldn’t automatically be assumed beneficial for another.
For most healthy people, probiotics appear relatively safe and commonly cause little more than temporary gas. But safety information—particularly regarding long-term use—is still incomplete, and risks can be greater for people who are seriously ill or immunocompromised.
So, What’s the Smarter Approach?
Stop treating supplements like health trophies.
Don’t take five products when you don’t have a clear reason for taking even one. Start with food, sleep, exercise, hydration and dietary variety. Fermented foods such as yogurt can provide microorganisms without turning your daily routine into a supplement competition.
If you’re considering a probiotic supplement, ask: Why am I taking this? Which strain? What dose? For how long?
Interestingly, there are no official recommendations for probiotic use in healthy people. The NIH recommends discussing the appropriate product, dose and duration with a healthcare professional.
And if a new supplement is followed by persistent bloating, diarrhea, confusion or unusual symptoms, don’t keep taking it because you assume it’s “detoxing” you. Stop and get medical advice.
Taking care of your health is a wonderful thing.
But becoming so obsessed with being healthy that you continuously add unnecessary products can defeat the purpose.
Sometimes better health isn’t about adding another supplement. It’s about knowing when enough is enough.