Beta-Glucans
β-Glucans / Beta-1,3/1,6-Glucan / Yeast Beta-Glucan
Polysaccharides composed of beta-linked glucose polymers found in yeast cell walls (Saccharomyces cerevisiae), mushrooms, oats, and barley. Beta-1,3/1,6-glucans bind to Dectin-1 receptors on macrophages and dendritic cells, priming innate immune responses. They train the immune system (trained immunity) without overstimulation. Distinct from soluble oat beta-glucans used for cholesterol reduction.
Half-life
~24 hours (immunomodulatory effects persist 24–48 hours after oral dosing)
Typical Dose
250–500 mg/day oral
300/500Route
oral
Category
immune
Evidence Overview
Strength of evidence across clinical, expert, and experimental lanes.
How Beta-Glucans is dosed in practice
Usually taken by mouth. Typical range: 250–500 mg/day oral. Half-life: ~24 hours (immunomodulatory effects persist 24–48 hours after oral dosing). Each card gives the dose, frequency and duration from one evidence lane: Clinical (human trials), Expert (practitioner protocols) or Experimental (early or animal data). These ranges describe what has been studied or used; they are not a prescription.
Work out the units to draw with the reconstitution calculator, how long a vial lasts with the vial duration calculator, and how levels fall between doses with the half-life calculator.
Small randomized trials of 250–500 mg/day yeast beta-glucan for 4–12 weeks reported fewer self-reported respiratory symptoms; a 90-day trial in older adults found no significant drop in confirmed infections. A 2013 trial of 900 mg/day for 16 weeks found 25% fewer colds.
- Randomized trials of yeast beta-glucan
- Trial of 900 mg/day (2013)
Preferred immune modulator among integrative practitioners due to strong safety profile and trained immunity mechanism. Yeast-derived (beta-1,3/1,6) superior to oat-derived (beta-1,3/1,4) for immune function. Mushroom extracts (reishi, turkey tail) provide beta-glucans plus additional bioactives.
- Integrative immunology clinical protocols
- Functional medicine practitioners — daily immune support stacks
- Mycology research — medicinal mushroom beta-glucan content
Widely used with high user satisfaction for reducing illness frequency. Athletes report fewer training disruptions from upper respiratory infections. Some users combine yeast beta-glucans with mushroom extracts for comprehensive immune coverage.
- Athletic performance community — infection prevention protocols
- Consumer supplement reviews for immune support
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Upgrade to ProSafety & Contraindications
- Organ transplant recipients on immunosuppressive therapy
- Active autoimmune disease in flare
- Known allergy to yeast or mushroom-derived products
Beta-Glucans: common questions
What is Beta-Glucans?
Polysaccharides composed of beta-linked glucose polymers found in yeast cell walls (Saccharomyces cerevisiae), mushrooms, oats, and barley. Beta-1,3/1,6-glucans bind to Dectin-1 receptors on macrophages and dendritic cells, priming innate immune responses. They train the immune system (trained immunity) without overstimulation. Distinct from soluble oat beta-glucans used for cholesterol reduction.
How is Beta-Glucans dosed?
Beta-Glucans is usually taken by mouth. Typical range in DoseCraft's library: 250–500 mg/day oral. Clinical (human trials): 250–500 mg/day yeast beta-glucan; 900 mg/day in one trial; Once daily; 4–16 weeks. Expert (practitioner protocols): 250–500 mg/day yeast beta-glucan; Once daily on empty stomach; Ongoing — particularly through cold/flu season. Experimental (early or animal data): 250–500 mg/day; Once daily; Ongoing. These ranges describe what has been studied or used; they are not a prescription.
Is Beta-Glucans FDA-approved?
Beta-Glucans is sold as a dietary supplement, which the FDA does not approve for safety or effectiveness before sale.
What is the half-life of Beta-Glucans?
DoseCraft's library lists a half-life of ~24 hours (immunomodulatory effects persist 24–48 hours after oral dosing). Half-life sets how often a compound is dosed and how long it takes to clear: about five half-lives.
Who should not use Beta-Glucans?
Listed contraindications: Organ transplant recipients on immunosuppressive therapy; Active autoimmune disease in flare; Known allergy to yeast or mushroom-derived products.
Information is for educational purposes only. Always consult a licensed healthcare provider before starting any peptide regimen.
Page updated . How we grade evidence: methodology.