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Evidence-Based Supplement Research
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Bifidobacterium plantarum

What does the research say about Bifidobacterium plantarum?

14 health outcomes synthesised

Bifidobacterium plantarum has been studied across 14 health outcomes, with the strongest evidence supporting a moderate effect on reducing depression symptoms (3 studies). Research also suggests potential benefits for inflammation (8 studies, low evidence) and cognitive function (7 studies, low evidence), though no consistent dose or population insights have emerged due to small sample sizes and reliance on review-level evidence.

Strongest Evidence The only outcome with moderate evidence strength is reduced depression symptoms, based on 3 studies reporting moderate, beneficial effects. However, the evidence base is small and primarily extrapolated from multi-species formulations or related strains.

Mixed or Weaker Evidence Most outcomes have low or very low evidence strength. For inflammation (8 studies, 7 beneficial) and cognitive function (7 studies, 7 beneficial), the evidence is consistently positive but limited by publication bias, small sample sizes, and reliance on reviews rather than original trials. Outcomes like gut microbiome composition, quality of life, and gastrointestinal symptoms have low evidence with few studies. Very low evidence outcomes include gut microbiota balance, immune function, SCFA production, immune modulation, gastrointestinal health, and oxidative stress, all based on small numbers of studies (3–6) that are often narrative reviews or animal models.

Effective Dose Patterns No consistent effective dose could be identified across any outcome. Studies rarely reported specific doses, durations, or supplement forms, making it impossible to derive a recommended range.

Population Insights Study populations vary widely, including adults, adolescents, athletes, and patients with specific conditions (e.g., IBS, CKD, psoriasis). Athletes appear in both inflammation and gastrointestinal symptom studies. However, most evidence lacks direct human trial data for the specific strain, and many studies use animal models or multi-strain formulations.

Notable Caveats Across all syntheses, key caveats include: (1) publication bias favoring positive results, (2) small evidence bases with preliminary conclusions, (3) reliance on review articles rather than primary clinical trials, (4) extrapolation from multi-species probiotics or different Bifidobacterium species, and (5) absence of standardized dose, duration, or form information.

Frequently asked

  • What is Bifidobacterium plantarum good for according to research?
    Research suggests Bifidobacterium plantarum may have moderate benefits for reducing depression symptoms (3 studies). Potential benefits are also seen for inflammation (7 of 8 studies beneficial) and cognitive function (7 of 7 studies beneficial), though evidence is low. Other outcomes like gut health, immune function, and quality of life have preliminary but very low evidence.
  • What dose of Bifidobacterium plantarum is typically used in studies?
    No consistent dose was reported across the 14 outcomes. Most studies did not provide individual dose, duration, or form data, making it impossible to establish a typical or effective dose range from the current evidence.
  • Who benefits most from Bifidobacterium plantarum?
    Study populations are diverse, including adults, adolescents, athletes, and patients with conditions like IBS, psoriasis, or chronic kidney disease. Athletes appear in multiple outcomes, but evidence is insufficient to identify a specific population that benefits most. Most studies lack direct human data for the single strain.
  • Are there caveats or limitations in the research on Bifidobacterium plantarum?
    Yes, major caveats include publication bias (positive results are more likely published), small evidence bases (most outcomes have 3–8 studies), reliance on review articles rather than original trials, and frequent use of multi-strain formulations or animal models, limiting applicability to humans.
  • Does Bifidobacterium plantarum help with depression symptoms?
    The evidence is moderate: 3 studies all reported beneficial moderate-sized effects on reducing depression symptoms, with 2 of 3 reaching statistical significance. However, the evidence base is small and mostly extrapolated from multi-species probiotics or Lactobacillus plantarum, not the specific strain.
  • Does Bifidobacterium plantarum help with inflammation?
    Low evidence suggests a potential benefit: 7 of 8 studies reported beneficial effects, with the highest-quality study (meta-analysis of 413 athletes) showing a statistically significant moderate reduction in TNF-α. One neutral study in adults with alcoholic liver disease found no significant effect. Publication bias and small samples limit confidence.

Most-studied combinations with Bifidobacterium plantarum

most supplement research is combination research
Also studied with:Lactobacillus rhamnosus (3), Bifidobacterium lactis UABla-12 (2), Lactobacillus casei rhamnosus (2), Lactobacillus acidophilus LA-02 (2), Lactobacillus rhamnosus HA-500 (2), Lactobacillus rhamnosus HA-114 (2), Bifidobacterium bifidum Rosell-71 (2), Fermented Soy Probiotic (2), Lactobacillus plantarum LP01 (2), Lactobacillus helveticus Rosell-52 (2), Lactobacillus lactis LI-23 (2), Bifidobacterium lactis Bb-02 (2)

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