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Head-to-head evidence comparison — which supplement is right for you?
L. rhamnosus GG vs Lactoferrin: L. rhamnosus GG has the stronger overall evidence (6 vs 6.3/10); they're alternatives for support immune system — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
L. rhamnosus GG wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
1 of 1 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both L. rhamnosus GG and Lactoferrin have evidence — compare verdict strength side-by-side.
10-20 billion CFU (1-2 x 10^10) daily; 10 billion CFU/day is the effective floor
any
Capsule standardized to ATCC 53103
200–300 mg daily for adults; 100–200 mg/day for children
30–60 minutes before breakfast, Between meals on an empty stomach
Bovine lactoferrin capsule or powder (≥95% purity)
During the antibiotic course
During hospital stay
n/a
n/a
4–8 weeks of use
4–8 weeks
4–8 weeks
6–12 weeks
Lactobacillus rhamnosus GG versus Placebo for Acute Gastroenteritis in Children.
N Engl J Med (2018) · Rct · n=971
Primary outcome (modified Vesikari score >=9 within 14 days): 11.8% with LGG vs 12.6% placebo; RR 0.96 (0.68-1.35), P=0.83
Systematic review with meta-analysis: Lactobacillus rhamnosus GG in the prevention of antibiotic-associated diarrhoea in children and adults.
Aliment Pharmacol Ther (2015) · Meta analysis
Antibiotic-associated diarrhea fell from 22.4% to 12.3%; RR 0.49 (0.29-0.83) pooled across 11 RCTs, n=1,308 (12 RCTs, n=1,499 included overall)
Probiotics for treating acute infectious diarrhoea.
Cochrane Database Syst Rev (2020) · Meta analysis
In studies at low risk of bias, no difference in diarrhea lasting >=48 hours (RR 1.00, 0.91-1.09; moderate certainty)
Effect of Lactoferrin Supplementation on Inflammation, Immune Function, and Prevention of Respiratory Tract Infections in Humans: A Systematic Review and Meta-analysis.
Advances in Nutrition (2022) · Meta analysis
Lactoferrin significantly reduced IL-6 in adults (mean difference: -24.9 pg/mL; 95% CI: -41.64, -8.08 pg/mL)
Lactoferrin reduces the risk of respiratory tract infections: A meta-analysis of randomized controlled trials.
Clinical Nutrition ESPEN (2021) · Meta analysis
Pooled analysis of RCTs showed significant reduction in respiratory tract infection risk with lactoferrin supplementation
Comparative Effects between Oral Lactoferrin and Ferrous Sulfate Supplementation on Iron-Deficiency Anemia: A Comprehensive Review and Meta-Analysis of Clinical Trials.
Nutrients (2022) · Meta analysis
Lactoferrin was non-inferior to ferrous sulfate for increasing hemoglobin and serum ferritin
Based on multiple meta-analyses showing OR 0.78 for RTI reduction. Effect more pronounced in children and preterm infants. Conservative estimates due to heterogeneity in populations studied.
AI-estimated from published studies. Interpret as directional guidance.
L. rhamnosus GG has a higher evidence score (6/10 vs 6.3/10) and wins in 2 of 3 categories.
For support immune system, Lactoferrin has a higher relevance score (92 vs 38).
No known interactions between L. rhamnosus GG and Lactoferrin have been documented in our database. However, always consult a healthcare provider before combining supplements.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.