Skip to main content
Evidence-Based Supplement Research
Evidence-Based Supplement Research
Pillser
Search
Sign UpLog In

Clostridium butyricum with Antidepressants for Anxiety: Evidence Review

A user asks whether taking Clostridium butyricum probiotic alongside antidepressants can reduce anxiety. The assistant reviews a 2018 randomized trial showing significant improvement in anxiety symptoms, explains the gut-brain axis mechanism via butyrate, and highlights limitations including small sample size and open-label design. Concludes with cautious optimism and recommendation to consult a healthcare provider.

  • Can taking Clostridium butyricum along with antidepressants help reduce anxiety?

  • Clostridium butyricum as an Adjunctive Therapy for Anxiety

    Based on research in Pillser's database, there is limited but promising evidence suggesting that taking Clostridium butyricum alongside antidepressants may help reduce anxiety.

    What the Research Shows

    Pillser's database contains 1 study on this specific combination, which reported a beneficial effect1:

    • Study type: Randomized controlled trial (2018)
    • Sample size: 20 participants with treatment-resistant major depressive disorder
    • Intervention: Clostridium butyricum MIYAIRI 588 (CBM588) at 60 mg/day for 8 weeks, taken alongside existing antidepressant medication
    • Result: Participants experienced a statistically significant improvement in anxiety symptoms, as measured by the Beck Anxiety Inventory, from baseline to week 82

    Why It May Work

    Clostridium butyricum is a butyrate-producing probiotic that influences the gut-brain axis. Butyrate (a short-chain fatty acid) has anti-inflammatory and neuroprotective properties, which may help modulate mood and anxiety. By improving gut health and reducing systemic inflammation, it may enhance the effects of conventional antidepressants in some individuals1.

    Important Caveats

    • This is based on a single small trial (n=20), so the evidence is preliminary.
    • The study was open-label (not double-blind), which means results should be interpreted cautiously.
    • It looked specifically at treatment-resistant depression — it's unclear if the same benefits would apply to all individuals with anxiety.

    Bottom Line

    Clostridium butyricum shows potential as an adjunctive therapy (taken alongside, not instead of) antidepressants for anxiety reduction, but more research is needed. You should consult your prescribing healthcare provider before adding any probiotic to your regimen, as interactions and individual responses can vary.

    Footnotes

    1. Pillser research database, Clostridium butyricum and Reduced Anxiety. ↩ ↩2

    2. Pillser research database, "Clostridium butyricum MIYAIRI 588 as Adjunctive Therapy for Treatment-Resistant Major Depressive Disorder" (2018). ↩

New Topic

Browse Related Questions

Back to top