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evidence · mechanism · dose
Supplements/Compound

Beta-Glucan

aka Yeast / oat beta-glucan

Polysaccharide that primes innate immune cells (yeast) or lowers cholesterol (oat).

Immune FunctionCardiovascular Health

Overview

Polysaccharide that primes innate immune cells (yeast) or lowers cholesterol (oat).

Natural sources
  • Baker's yeast
  • Oats
  • Mushrooms
Common forms
  • Yeast beta-1,3/1,6-glucan
  • Oat beta-glucan

Mechanism of action

Activates Dectin-1 on innate immune cells (yeast); binds bile acids (oat).

Pathways
  • · Dectin-1 / TLR2 activation
  • · Bile acid binding

Effects on the body

Supports
Innate immune readiness
Decreases
LDL cholesterol (oat)

Organ system effects

Cardiovascular

Oat beta-glucan lowers LDL.

Evidence-based benefits

Reduces URI in stressed athletes (yeast)

Moderate evidence

Reduces LDL (oat, 3 g/d)

Strong evidence

Potential side effects

Common
    Rare
      Serious

        Drug interactions

        No notable interactions reported.

        Safety & non-supplemental interactions

        Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

        Avoid with these conditions
        • ·Autoimmune disease (theoretical immune activation)
        Avoid / monitor with these medications
        • ·Immunosuppressants

        Supplement interactions

        Pairs well with

        None listed.

        Avoid combining with

        No specific avoidances listed.

        Dosing & bioavailability

        Typical dose
        250–500 mg yeast or 3 g oat/d

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

        Scientific evidence (9)

        RCTEur J Nutr · 2013

        Beta-1,3/1,6-glucan and immune function

        Auinger A, et al.

        16-week RCT of yeast beta-glucan.

        Key findings

        Reduced URTI incidence and severity.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Beta-Glucan — Reduces URI in stressed athletes

        Live PubMed search

        Live results for "Beta-Glucan Reduces URI in stressed athletes" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Beta-Glucan and "Reduces URI in stressed athletes". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Beta-Glucan — Reduces LDL

        Live PubMed search

        Live results for "Beta-Glucan Reduces LDL" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

        Opens current human and preclinical literature matching Beta-Glucan and "Reduces LDL". Filter by RCT, meta-analysis, or year on the results page.

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Beta-Glucan — randomized controlled trial

        Live PubMed search

        Live results for "Beta-Glucan randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

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

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Beta-Glucan — meta-analysis

        Live PubMed search

        Live results for "Beta-Glucan meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

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

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Beta-Glucan — pharmacokinetics

        Live PubMed search

        Live results for "Beta-Glucan pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

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

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Beta-Glucan — safety adverse events

        Live PubMed search

        Live results for "Beta-Glucan safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

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

        Open study
        Systematic reviewPubMed (NLM) · 1970

        PubMed: Beta-Glucan — dose response

        Live PubMed search

        Live results for "Beta-Glucan dose response" across the PubMed/MEDLINE peer-reviewed index.

        Key findings

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

        Open study
        Systematic reviewGoogle Scholar · 1970

        Google Scholar: Beta-Glucan — clinical evidence

        Live Scholar search

        Cross-database citation index for Beta-Glucan 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.