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Lactobacillus plantarum

What does the research say about Lactobacillus plantarum?

2 health outcomes synthesised

Lactobacillus plantarum is a probiotic whole food researched primarily for its effects on blood lipid profiles. Across 2 health outcomes (LDL and total cholesterol reduction), the strongest evidence, albeit limited, is for reducing LDL cholesterol, where all 3 available studies reported beneficial effects. No consistent effective dose or population-specific benefits could be identified from the current research.

Strongest evidence The most researched outcome for Lactobacillus plantarum is reduced LDL cholesterol, supported by 3 studies with low evidence strength. All 3 studies reported beneficial effects, with 2 of 3 reaching statistical significance. Effect sizes were mixed (small to moderate); the highest-quality meta-analysis reported an LDL-C reduction of 0.23 mmol/L. No consistent dose range or study duration could be identified.

Mixed or weaker evidence For reduced total blood cholesterol, the evidence is very low strength and mixed. Across 3 studies, 2 found small beneficial effects, while 1 reported a neutral non-significant result (in patients with T2DM/prediabetes). This suggests the benefit may not generalize to all populations.

Effective dose patterns Neither outcome had a consistent effective dose or form (e.g., live bacteria, heat-killed) identifiable from the available data, as reporting was incomplete.

Population insights Population-specific differences are possible: the only neutral and non-significant finding across both outcomes came from a small subgroup analysis in patients with T2DM or prediabetes, suggesting these groups may respond differently or the analyses lacked statistical power.

Notable caveats

  • The evidence base is very small (only 3 papers per outcome).
  • Conclusions should be considered preliminary.
  • The clinical literature in this area is subject to publication bias (null-result studies are less likely to be published).
  • Effect sizes were small to moderate, and clinical significance remains unclear for total cholesterol.

Frequently asked

  • What is Lactobacillus plantarum good for according to research?
    Current research suggests Lactobacillus plantarum may help reduce LDL cholesterol and total cholesterol. All 3 studies on LDL cholesterol reported beneficial effects, while for total cholesterol, 2 of 3 studies found small benefits and 1 showed no effect. The evidence base is small and preliminary.
  • What dose of Lactobacillus plantarum is typically used in studies?
    No consistent dose range has been established from the available studies. Reporting on dosing, form, and study duration was incomplete, so no typical or effective dose can be reliably identified at this time.
  • Who benefits most from Lactobacillus plantarum?
    The research does not clearly identify a population that benefits most. One study in patients with type 2 diabetes and prediabetes found a neutral effect on LDL cholesterol, while other studies in broader populations showed benefits. More research is needed to determine if certain groups respond differently.
  • Are there caveats or limitations in the research on Lactobacillus plantarum?
    Yes. The evidence base is very small (only 3 studies per outcome), making conclusions preliminary. Publication bias is a concern, as null results are less likely to be published. Effect sizes ranged from small to moderate, and clinical significance for total cholesterol reduction remains unclear.
  • Does Lactobacillus plantarum help with reducing LDL cholesterol?
    All 3 studies on Lactobacillus plantarum reported beneficial effects on LDL cholesterol reduction, with 2 reaching statistical significance. The evidence strength is low, and the effect size is mixed (small to moderate). The highest-quality meta-analysis found a reduction of 0.23 mmol/L.
  • Does Lactobacillus plantarum help with reducing total cholesterol?
    The evidence is mixed. Across 3 studies, 2 reported small beneficial effects on total cholesterol, while 1 found a neutral non-significant effect. The evidence strength is very low, and the clinical significance of the small effect is unclear.

Most-studied combinations with Lactobacillus plantarum

most supplement research is combination research
Also studied with:Lactobacillus rhamnosus (2)

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