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evidence · mechanism · dose
Supplements/Compound

Lactobacillus Rhamnosus GG

Most-studied single strain — atopy, pediatric diarrhea, and antibiotic recovery.

Microbiome SupportGut HealthImmune Function (alias)

Overview

Most-studied single strain — atopy, pediatric diarrhea, and antibiotic recovery.

Natural sources
    Common forms

      Mechanism of action

      Adheres to intestinal mucosa, competitive exclusion, IgA stimulation.

      Pathways

        Effects on the body

        Organ system effects

        Evidence-based benefits

        Reduces pediatric infectious diarrhea duration

        Strong evidence

        Potential side effects

        Common
          Rare
            Serious

              Drug interactions

              No notable interactions reported.

              Supplement interactions

              Pairs well with

              None listed.

              Avoid combining with

              No specific avoidances listed.

              Dosing & bioavailability

              Typical dose
              10 billion CFU/d
              With food?
              Optional

              Where to buy

              Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

              Compound
              Lactobacillu…
              Amazon
              Wide selection · fast shipping
              Compound
              Lactobacillu…
              iHerb
              Global delivery · curated brands
              Compound
              Lactobacillu…
              Thorne
              Practitioner-grade · NSF tested

              Scientific evidence (8)

              Meta-analysisAliment Pharmacol Ther · 2013

              L. rhamnosus GG for pediatric diarrhea

              Szajewska H, et al.

              Meta-analysis of LGG in acute pediatric diarrhea.

              Key findings

              Reduced duration by ~1 day vs placebo.

              Open study
              Systematic reviewPubMed (NLM) · 1970

              PubMed: Lactobacillus Rhamnosus GG — Reduces pediatric infectious diarrhea duration

              Live PubMed search

              Live results for "Lactobacillus Rhamnosus GG Reduces pediatric infectious diarrhea duration" across the PubMed/MEDLINE peer-reviewed index.

              Key findings

              Opens current human and preclinical literature matching Lactobacillus Rhamnosus GG and "Reduces pediatric infectious diarrhea duration". Filter by RCT, meta-analysis, or year on the results page.

              Open study
              Systematic reviewPubMed (NLM) · 1970

              PubMed: Lactobacillus Rhamnosus GG — randomized controlled trial

              Live PubMed search

              Live results for "Lactobacillus Rhamnosus GG randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

              Key findings

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

              Open study
              Systematic reviewPubMed (NLM) · 1970

              PubMed: Lactobacillus Rhamnosus GG — meta-analysis

              Live PubMed search

              Live results for "Lactobacillus Rhamnosus GG meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

              Key findings

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

              Open study
              Systematic reviewPubMed (NLM) · 1970

              PubMed: Lactobacillus Rhamnosus GG — pharmacokinetics

              Live PubMed search

              Live results for "Lactobacillus Rhamnosus GG pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

              Key findings

              Opens current human and preclinical literature matching Lactobacillus Rhamnosus GG and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

              Open study
              Systematic reviewPubMed (NLM) · 1970

              PubMed: Lactobacillus Rhamnosus GG — safety adverse events

              Live PubMed search

              Live results for "Lactobacillus Rhamnosus GG safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

              Key findings

              Opens current human and preclinical literature matching Lactobacillus Rhamnosus GG and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

              Open study
              Systematic reviewPubMed (NLM) · 1970

              PubMed: Lactobacillus Rhamnosus GG — dose response

              Live PubMed search

              Live results for "Lactobacillus Rhamnosus GG dose response" across the PubMed/MEDLINE peer-reviewed index.

              Key findings

              Opens current human and preclinical literature matching Lactobacillus Rhamnosus GG and "dose response". Filter by RCT, meta-analysis, or year on the results page.

              Open study
              Systematic reviewGoogle Scholar · 1970

              Google Scholar: Lactobacillus Rhamnosus GG — clinical evidence

              Live Scholar search

              Cross-database citation index for Lactobacillus Rhamnosus GG as it relates to "clinical evidence".

              Key findings

              Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

              Open study
              Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.