Lactobacillus plantarum
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A species of lactic-acid-producing bacteria found naturally in fermented foods and used as a probiotic strain in supplements.
Why it’s used
Taken to support digestive comfort and gut microbial balance, with some strains studied for immune-related outcomes.
What the evidence says
Probiotic effects are strain-specific, and evidence varies widely depending on the exact Lactobacillus plantarum strain used. Some individual trials report modest digestive benefits, but results are inconsistent across studies and strains, and unspecified or pooled claims about the species as a whole are not well supported by major reviews.
Where we looked
There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.
- PubMed: 212 records · searched August 2026
"Lactobacillus plantarum"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH] - PubMed: 7904 records · searched August 2026
"Lactobacillus plantarum"[Title/Abstract]
This says what this database holds under these terms. It is not a finding that no research exists.
Context
Probiotic research typically reports dosing in colony-forming units (CFU) rather than mass, and specific strains and doses vary considerably between studies, limiting generalization.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.