Lactobacillus Plantarum
Lactiplantibacillus plantarum
TL;DR
L. plantarum 299v has repeatedly reduced IBS bloating and abdominal pain in placebo-controlled trials. It is the single-strain probiotic with the most convincing gut-symptom data.
Ideal For
- Bloating-dominant IBS
- People on plant-based diets wanting better iron absorption
- Anyone who wants one strain with real trial data rather than a blend
Avoid If
- You are severely immunocompromised
- You need rapid relief - trials ran 4 weeks
- Symptoms include alarm features that need medical work-up
Frequently Asked Questions
Overview
Lactiplantibacillus plantarum is unusually adaptable: it survives gastric transit well, tolerates bile, and colonises the human colon more persistently than most lactobacilli. The best-studied strain, DSM 9843 (299v), has been through multiple randomized placebo-controlled trials in irritable bowel syndrome.
Across those trials, four weeks of 10 billion CFU per day reduced bloating and abdominal pain versus placebo, with the clearest signal in bloating-dominant and IBS-D patients. A pooled analysis of the 299v trials reported responder rates around 78% versus 45% for placebo. Effects on stool frequency are less consistent than effects on pain and distension.
Other strains have separate literature: 299v also improves iron absorption from plant-based meals, and some strains show modest lipid and mood effects. Do not assume strain data transfers - buy the strain that matches the outcome you want.
How It Works
- Adheres to mannose residues on colonocytes, displacing pathogens
- Ferments prebiotic fibre to short-chain fatty acids that lower colonic pH
- Reduces gas-producing bacterial overgrowth, easing distension
- Dampens visceral hypersensitivity via reduced mucosal inflammatory signalling
- Enhances non-heme iron absorption when taken with plant meals
Benefits & Outcomes
No linked outcomes yet. Research is ongoing.
Supporting Research7 studies
Randomized Controlled Trial of Probiotic PS128 in Children with Tourette Syndrome
Lactobacillus plantarum PS128 did not significantly improve Yale Global Tic Severity Scale scores compared with placebo over two months.
Clinical trial: the effects of a probiotic (Lactobacillus plantarum 299v) on symptoms of irritable bowel syndrome, a randomized double-blind placebo-controlled study
Ducrotte P, Sawant P, Jayanthi V
Abdominal pain and bloating severity and frequency fell significantly more with L. plantarum 299v than placebo, with 78 percent rating the treatment good or excellent.
Outcome-specific efficacy of Lactobacillus plantarum in irritable bowel syndrome and functional gastrointestinal disorders: a systematic review of randomized trials
Liu Y, Yu X, Yu L +8 more
Benefits were most consistent for IBS-related abdominal pain and bloating, while metabolic and lipid effects were small and strain-specific.
Effect of Lactobacillus plantarum on symptoms of irritable bowel syndrome: a randomized trial with a null primary outcome
Sen S, Mullan MM, Parker TJ +3 more
Neither IBS symptom scores nor colonic gas production differed significantly between L. plantarum and placebo.
Lactobacillus plantarum 299v supplementation improves vascular endothelial function and reduces inflammatory biomarkers in men with stable coronary artery disease
Malik M, Suboc TM, Tyagi S +7 more
Flow-mediated dilation improved significantly and circulating IL-8, IL-12 and leptin fell with L. plantarum 299v versus placebo.
Effect of Lactobacillus plantarum 299v on iron absorption in women of reproductive age: a randomized double-blind placebo-controlled trial
Hoppe M, Onning G, Berggren A +1 more
Iron absorption increased significantly when the drink contained L. plantarum 299v compared with the same drink without it.
Probiotics for the management of irritable bowel syndrome: a systematic review and three-level meta-analysis
Xie P, Luo M, Deng X +2 more
Probiotics produced small significant reductions in global IBS symptom severity and abdominal pain, with effects varying widely by strain.
Safety Information
Potential Side Effects
Mild gas or transient increase in bloating in the first week, which usually settles.
Contraindications
Avoid in severe immunosuppression, critical illness or with central venous access. Stop if symptoms clearly worsen after two weeks.
Drug Interactions
- Antibiotics reduce viability - separate by 2 hours
- Theoretical caution with immunosuppressants
Pregnancy & Breastfeeding
Pregnancy: likely_safe
Breastfeeding: likely_safe
Dosage Guidelines
Dosage Used in Studies
Consult healthcare provider
Best Time to Take
Once daily, morning with breakfast
Best Form
299v (DSM 9843) named-strain capsule
Dosing by Goal
| Goal | Dose | Notes |
|---|---|---|
| 10 billion CFU/day | Trial protocols ran 4 weeks; reassess at 4 weeks | |
| 10 billion CFU/day | Studied with plant-based meals and iron supplements |
Forms Compared
The strain behind the IBS and iron-absorption data
Sauerkraut and brines are natural sources; dose is unquantified
Food & Timing
With a meal; take alongside food when the goal is iron absorption.
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.