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Ingredient guide
Probiotic (L. rhamnosus GG): evidence, dose and safety
Lacticaseibacillus rhamnosus GG (LGG) is one of the most studied probiotic strains. Effects of probiotics are specific to the strain, so results for one strain do not carry over to others.
At a glance
- Strongest evidence
- B Good
- Dose in our plans
- 10 billion CFU a day for adults
- Safety checks
- 1 situation and 0 medicine or supplement interactions, checked against your answers in every plan
- Reviewed
- Atrum Labs clinical team (MD, PhD), November 2026
What the research looked at
Each line is one body of research, graded A (strong) to D (weak). How we grade evidence. What each study measured is explained in your personal plan.
| Grade | Who was studied | References |
|---|---|---|
| B | Children and adults on antibiotics |
|
How much
- Our plans usually use 10 billion CFU a day for adults. The exact dose depends on your lab results, age and medicines.
- Children's doses are set by age, and some ingredients are for adults only.
Who should not take it, or should check first
- A clinician checks first. Rare Lactobacillus bloodstream infections are reported in people with weakened immunity.
Written and reviewed by the Atrum Labs clinical team (physician-scientists, MD, PhD) from our clinical knowledge base, version 0.2.0-draft. This page is general information, not medical advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle.
See if it belongs in your plan