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Lactobacillus plantarum

What does the research say about Lactobacillus plantarum?

2 health outcomes synthesised

Lactobacillus plantarum is a probiotic bacterium researched primarily for its effects on blood lipid levels. Current evidence covers 2 health outcomes, with the strongest area of research focused on cholesterol reduction, supported by 3 studies each for LDL and total cholesterol. Doses and study durations were not consistently reported across these studies, and the evidence is limited by small sample sizes.

Strongest evidence: The available research on Lactobacillus plantarum is limited to low-strength evidence for reducing both LDL cholesterol and total cholesterol. All 3 studies for each outcome reported beneficial effects; however, only 2 of 3 studies in each case found statistically significant reductions. Effect sizes ranged from small to moderate, with one meta-analysis reporting a moderate LDL reduction of 0.23 mmol/L (95% CI: -0.36 to -0.10). No specific effective dose range emerged due to inconsistent reporting.

Mixed or weaker evidence: Both outcomes have low evidence strength due to small sample sizes and the inclusion of L. plantarum in multi-probiotic formulations, making it difficult to isolate its specific effect. One meta-analysis in patients with type 2 diabetes and prediabetes found a non-significant reduction in LDL cholesterol.

Effective dose patterns: No cross-cutting dose insights are available as effective doses were not consistently reported or extracted across the 3 studies for either outcome.

Population insights: Populations studied include patients with type 2 diabetes and prediabetes (noted in one study) and general adults without specified conditions. The limited data do not support conclusions about specific population subgroups.

Notable caveats: The evidence base consists of only 3 studies per outcome. One study (2024) in T2DM/prediabetes patients did not find a statistically significant reduction for total cholesterol. No form or dose data were extracted, limiting practical guidance. The inability to isolate L. plantarum from multi-probiotic formulations in some analyses is a key methodological limitation.

Frequently asked

  • What is Lactobacillus plantarum good for according to research?
    Based on current research, Lactobacillus plantarum has been studied for reducing LDL cholesterol and total cholesterol. Across 3 studies for each outcome, all reported beneficial effects, though only 2 of the 3 findings were statistically significant. The evidence strength is low due to limited sample sizes and study quality.
  • What dose of Lactobacillus plantarum is typically used in studies?
    The available studies did not consistently report the specific doses of Lactobacillus plantarum used. No effective dose range can be identified from the current evidence base. This limits the ability to draw dose-related conclusions.
  • Who benefits most from Lactobacillus plantarum?
    The research includes patients with type 2 diabetes and prediabetes in one study, and general adult populations in others. The evidence is insufficient to determine which specific populations benefit most, as sample sizes were small and results were not consistently significant across all studies.
  • Are there caveats or limitations in the research on Lactobacillus plantarum?
    Yes. The evidence is limited to only 3 studies per outcome, all with low evidence strength. Some analyses included L. plantarum alongside other probiotics, making it difficult to isolate its specific effect. One study in T2DM/prediabetes patients found non-significant results for LDL and total cholesterol. Doses and study durations were often not reported.
  • Does Lactobacillus plantarum help with reducing LDL cholesterol?
    All 3 studies on LDL cholesterol reported beneficial effects of L. plantarum supplementation, with 2 of 3 reaching statistical significance. One meta-analysis found a moderate reduction of 0.23 mmol/L. However, the evidence is low strength and includes caveats such as small sample sizes and multi-probiotic formulations.
  • Does Lactobacillus plantarum help with reducing total cholesterol?
    Three studies reported beneficial effects on total cholesterol, with two showing statistically significant reductions. Effect sizes ranged from small to moderate. However, one 2024 study in T2DM/prediabetes patients did not find a statistically significant reduction. The overall evidence strength is low.

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