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Lactobacillus plantarum

What does the research say about Lactobacillus plantarum?

2 health outcomes synthesised

Lactobacillus plantarum has been studied for 2 health outcomes, all related to cholesterol reduction. The strongest evidence, with 4 meta-analyses, supports a small beneficial effect on reducing LDL cholesterol, though the effect may be modest and population-dependent. No consistent effective dose or formulation has been reported across studies, and the research is subject to publication bias.

Strongest evidence: Both outcomes—reduced LDL cholesterol and reduced blood cholesterol—have moderate evidence strength. Across 4 meta-analyses, all 4 reported small beneficial effects of Lactobacillus plantarum on LDL cholesterol, with 3 reaching statistical significance. For total cholesterol, 3 of 4 meta-analyses found small significant reductions, while one study in patients with type 2 diabetes and prediabetes showed a non-significant tendency. No consistent dose or duration data were available across the reviews.

Mixed or weaker evidence: There is no low- or very-low-evidence outcome here. However, the evidence for total cholesterol includes one neutral finding (no significant effect), and the effect sizes are uniformly small. The reliance on review-level analyses without individual patient data limits precision.

Effective dose patterns: No effective dose range could be derived from the available syntheses, as doses and study durations were not consistently reported across the included reviews.

Population insights: The only population-specific finding is that patients with type 2 diabetes and prediabetes may not experience a significant cholesterol-lowering effect, suggesting the benefit could be population-dependent. No other subgroup analyses (e.g., by age, baseline cholesterol level) were available.

Notable caveats: The evidence is overwhelmingly positive, but publication bias is a concern—null results are less likely to be published. Effect sizes are small across all analyses, and clinical significance may be modest. The lack of consistent dose and form information makes it difficult to generalize findings to real-world supplementation.

Frequently asked

  • What is Lactobacillus plantarum good for according to research?
    Research shows small beneficial effects on reducing LDL cholesterol (4 meta-analyses, all reporting benefit) and total cholesterol (3 of 4 meta-analyses showing significant reductions). The evidence strength is moderate for both outcomes.
  • What dose of Lactobacillus plantarum is typically used in studies?
    No consistent dose or formulation has been reported across the meta-analyses. The included reviews did not provide standardized dose ranges, so an effective dose cannot be identified from the current evidence.
  • Who benefits most from Lactobacillus plantarum?
    The evidence does not identify a specific population that benefits most. However, one analysis limited to patients with type 2 diabetes and prediabetes found no significant effect on cholesterol, suggesting that individuals without these conditions may be more likely to see a benefit.
  • Are there caveats or limitations in the research on Lactobacillus plantarum?
    Yes, the available evidence is subject to publication bias, as null results are less likely to be published. Effect sizes are uniformly small, and clinical significance may be modest. Additionally, no consistent dose or study duration information was available across the reviews.
  • Does Lactobacillus plantarum help with reducing LDL cholesterol?
    Yes, all 4 meta-analyses on Lactobacillus plantarum and LDL cholesterol reported small beneficial effects, with 3 achieving statistical significance. The largest pooled analysis (26 RCTs, 2104 participants) confirmed a significant small reduction.
  • Does Lactobacillus plantarum help with reducing total blood cholesterol?
    Three out of 4 meta-analyses found small statistically significant reductions in total cholesterol. One study in patients with type 2 diabetes and prediabetes found a non-significant tendency, indicating the effect may be modest and population-dependent.

Most-studied combinations with Lactobacillus plantarum

most supplement research is combination research
Also studied with:Lactobacillus rhamnosus (2), Lactobacillus salivarius (2), Lactobacillus acidophilus (3), Lactobacillus fermentum (3), bifidobacterium longum (2)

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