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Compound

Lactobacillus plantarum 299v

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Lactobacillus plantarum 299v. Single-strain probiotic with the strongest IBS evidence.

How it works. Adheres to mannose receptors on enterocytes; produces short-chain fatty acids.

What the research supports. 1 graded claims. Strongest: Reduces IBS pain and bloating (strong).

How much to take. Typical dose: 10 billion CFU.

Side effects and interactions. 1 medication interaction listed. No serious side effects listed at normal doses.

Stacking. Pairs well with A high-quality multivitamin, Omega-3 (EPA/DHA).

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried Lactobacillus plantarum 299v. Anecdotes are not medical advice.

Lactobacillus plantarum 299v. Single-strain probiotic with the strongest IBS evidence.

No single structure

What it is

Single-strain probiotic with the strongest IBS evidence.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

How it works

Adheres to mannose receptors on enterocytes; produces short-chain fatty acids.

Pathways

  • Adheres to mannose receptors on enterocytes
  • produces short-chain fatty acids

Effects

  • ↓IBS pain and bloating decreases

What the research supports

Reduces IBS pain and bloatingstrong

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
10 billion CFU
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith meals
Best formMost evidence is based on the capsule or softgel form.
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Side effects & interactions

Common side effects

  • Initial bloating

Medication interactions

Prescription medications (general)minor

Always disclose Lactobacillus plantarum 299v use to your prescriber — additive, antagonistic, or pharmacokinetic interactions are possible.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • A high-quality multivitaminCovers micronutrient cofactors that support most supplement pathways.
  • Omega-3 (EPA/DHA)Foundational anti-inflammatory support that complements most regimens.

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: Lactobacillus plantarum 299v — Reduces IBS pain and bloating ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Lactobacillus plantarum 299v and "Reduces IBS pain and bloating". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Lactobacillus plantarum 299v — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Lactobacillus plantarum 299v and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: Lactobacillus plantarum 299v — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching Lactobacillus plantarum 299v and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

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