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Head-to-head evidence comparison — which supplement is right for you?
Beta-Glucans vs Saccharomyces Boulardii: they're closely matched on evidence (5 vs 8.5/10); 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.
Beta-Glucans and Saccharomyces Boulardii are closely matched across evidence, studies, and safety.
Verdict
Likely helps
7 of 7 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
4 of 4 studies with measurable effects showed benefit.
Top outcomes
250-500mg yeast beta-glucan a day for immune use. Oat and barley beta-glucan has its own entry, Oat Beta-Glucan.
Morning, With or without food
Yeast-derived 1,3/1,6 beta-glucan (Wellmune is most studied)
250-500mg (5-10 billion CFU) daily
With or without food, At least 2 hours away from antifungals
Capsules (lyophilized)
4-12 weeks
During illness
During use
1-3 days
1-2 weeks
Galactomannans are the most effective soluble dietary fibers in type 2 diabetes: a systematic review and network meta-analysis
The American journal of clinical nutrition (2023) · Meta analysis · n=2685
Galactomannans had the highest effect on reducing the levels of HbA1c (SUCRA: 92.33%) and fasting blood glucose (SUCRA: 85.92%).
Effects of Oat Beta-Glucan Intake on Lipid Profiles in Hypercholesterolemic Adults: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Nutrients (2022) · Meta analysis · n=927
The results were presented with the weighted mean difference (WMD) with a 95% CI.
A systematic review and meta-analysis of beta-glucan consumption on glycemic control in hypercholesterolemic individuals
International journal of food sciences and nutrition (2015) · Meta analysis · n=603
The summary estimate for fasting insulin was 0.75 pmol/L (95% CI -1.82 to 3.32). The abstract's estimate for fasting glucose lies outside its printed interval, so that number is withheld until the full text confirms it.
Efficacy and safety of Saccharomyces boulardii as an adjuvant therapy for the eradication of Helicobacter pylori: a meta-analysis
Frontiers in cellular and infection microbiology (2025) · Meta analysis · n=5036
Meta-analysis of 19 studies with 5,036 people with H. pylori infection, adding S. boulardii to standard eradication therapy.
Probiotics for treating acute infectious diarrhoea
The Cochrane database of systematic reviews (2020) · Meta analysis · n=12127
Effect size was similar in the sensitivity analysis and marked heterogeneity persisted.
The use of probiotics and prebiotics in decolonizing pathogenic bacteria from the gut; a systematic review and meta-analysis of clinical outcomes
Gut microbes (2024) · Meta analysis · n=2871
This review aims to analyze available evidence from human-controlled trials to determine the effect size of probiotic interventions in decolonizing AMR pathogenic bacteria from the gut.
Both points come from a meta-analysis of 10 randomised trials adding S. boulardii to bismuth quadruple therapy (PMID 40251486), whose dose subgroups found the same gain in eradication at 500 mg a day (RR 1.10, 95% CI 1.03 to 1.17) and 1000 mg a day (RR 1.08, 95% CI 1.03 to 1.12). Effectiveness is the relative gain in eradication in percent. Total adverse effects fell with S. boulardii (RR 0.53), so the side effect values are low. The authors recommend 500 mg a day for more than 10 days. The effect is as an add-on to antibiotics only, and doses are in mg of product, not CFU.
AI-estimated from published studies. Interpret as directional guidance.
Both Beta-Glucans and Saccharomyces Boulardii are closely matched — the best choice depends on your specific health goals.
For support immune system, Beta-Glucans has a higher relevance score (95 vs 60).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.