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Does Probiotics help with mood?

Yes, for most people. 100% of 54 people who reported on Probiotics for mood say it improved. 0% noticed no change and 0% say it got worse. That is above the typical result for mood (84% across 108 options).

Mood: what users report
100%better54 reports · medium confidence
54 better0 no change0 worse

Ranked #1 of 108 for mood.

What people say about Probiotics and mood

“I had treatment resistant depression...What finally worked was...introducing pre/pro biotics for gut health. It has been life changing.”
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“When I take them together, my mood significantly improves, I sleep less and I feel well rested... consistently wake up with less sleep (almost an hour). I am experiencing no negatives.”
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“megadosing a probiotic that's worked well for me in the past that I've felt better. And the change has been overnight.”
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“Probiotics! And I started using VitaMax tablets again today. I feel amazing and honestly working better than coffee. But get yourself some good probiotics and take them a few weeks.”
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What the research says

AResearch: Strong2,293 meta-analyses · 2,235 trials on PubMed
Nutr Rev · 2025
Effects of Prebiotics and Probiotics on Symptoms of Depression and Anxiety in Clinically Diagnosed Samples: Systematic Review and Meta-analysis of Randomized Controlled Trials

Conclusion: Probiotics showed substantial reductions in depression symptoms and moderate reductions in anxiety symptoms. Prebiotics showed a nonsignificant trend toward reducing depression. An adjunctive mental health treatment approach that diagnoses, monitors, and treats the gut microbiome alongside traditional pharmacological treatment holds promise for clinical practice.

Side effects people mention

stomach issues 11brain fog 2diarrhea 2withdrawal 1fatigue 1

What else is Probiotics used for?

Information only — not medical advice. How we count

Does Probiotics help with mood? 100% of 54 users say yes — PlainPill