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Probiotic

Lactobacillus rhamnosus GG

Also known as: Culturelle, Culturelle strain, L. rhamnosus, L. rhamnosus GG

A
Evidence

One of the most researched probiotic strains. Excellent for antibiotic-associated diarrhea and traveler's diarrhea prevention.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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The highest-scored Lactobacillus rhamnosus GG product in our catalog (62/100). Track dose and overlaps in the app.
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Common questions

How much Lactobacillus rhamnosus GG should I take?

The typical range is 10-20 billion CFU daily. During and after antibiotics

When should I take Lactobacillus rhamnosus GG?

Any time. Either way.

Which form of Lactobacillus rhamnosus GG is best?

Capsules — Culturelle common brand.

Is Lactobacillus rhamnosus GG safe?

Commonly reported: Minimal. Serious warnings: Same as acidophilus. Safe

Which Lactobacillus rhamnosus GG supplement scores highest?

Culturelle Ultimate Balance for Antibiotics Capsules, at 62/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.

Primary uses

  • Diarrhea prevention
  • Antibiotic support
  • Traveler's health
  • Immune support

How it works

  • Strong gut adherence
  • Immune modulation
  • Pathogen exclusion

Dosage

Typical range
10-20 billion CFU daily
Timing
Any time
With food
Either way
Duration
During and after antibiotics
Special populations
Antibiotic users, travelers

Forms

  • Capsules

Safety

Common side effects

  • Minimal

Contraindications

  • Severe immunocompromise

Products containing Lactobacillus rhamnosus GG

Top-scoring supplements in our catalog that list Lactobacillus rhamnosus GG on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.

Culturelle
Ultimate Balance for Antibiotics Capsules
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62
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Evidence notes

Most studied probiotic strain

Grade A: Multiple well-designed human trials support the main claims.

Cited research for Lactobacillus rhamnosus GG

Clinical studies referenced across Formulate guides that mention lactobacillus rhamnosus gg. Each links to the full study page with PubMed source + the guides that cite it.

Related in Probiotic

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.