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Beta-Glucans (1,3/1,6)
Polysaccharides from yeast, mushrooms, or oats that train innate immune cells to respond faster to infections and pathogens.
What the evidence says
Beta-Glucans appears to help in 14 of 16 studies with measurable effects — the evidence leans clearly favourable.
Most evidence is from high-quality meta-analyses and randomised trials published 2007–2026 with a typical study size of 129 participants.
Based on 48 studies · 19 meta-analyses · 13 RCTs · 17,892 total participants
Confidence
HighWhat the studies found
By outcome
Beta-Glucans has an evidence score of 8/10 — strong evidence based on 48 indexed studies, including 19 meta-analyses. Polysaccharides from yeast, mushrooms, or oats that train innate immune cells to respond faster to infections and pathogens.
The commonly studied dose of Beta-Glucans is 250-500mg yeast beta-glucan OR 3g oat beta-glucan for cholesterol. Research points to an estimated optimal dose around 3mg, with a minimum effective dose near 2mg. Individual response varies — start low and adjust.
The best time to take Beta-Glucans is in the morning. It can be taken on an empty stomach. For immune support, beta-glucans should be taken on an empty stomach so they interact directly with gut-associated lymphoid tissue (GALT) and Peyer's patches without interference from food matrix.
Luteolin
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Propolis
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Last reviewed May 2026 · evidence from 39 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Beta-glucans are glucose polymers found in the cell walls of yeast, fungi, oats, and barley. The 1,3/1,6 forms from yeast and mushrooms are potent immune modulators, while oat beta-glucans primarily lower cholesterol. They train the innate immune system to respond more effectively to pathogens without overstimulation. Among the most well-researched immune supplements.
Primes innate immune cells for faster response
Activates first-line immune defenders
Binds bile acids to lower cholesterol
How Beta-Glucans works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
250-500mg yeast beta-glucan OR 3g oat beta-glucan for cholesterol
Can be taken without food
| Form | Type |
|---|---|
| 💊Yeast-derived 1,3/1,6 beta-glucan (Wellmune is most studied) | Recommended |
| 💊Mushroom-derived beta-glucans | Alternative |
| 💊Oat beta-glucan (for cholesterol) | Alternative |
Wellmune is the most clinically validated for immune support. Oat beta-glucan is specifically for cholesterol.
Minimum: 4 weeks
Optimal: 12 weeks
Cycling: Not required
Note: Yeast beta-glucan can be taken any time. Oat beta-glucan for cholesterol should be taken with meals.
Based on multiple meta-analyses showing 0.24-0.32 mmol/L LDL reduction. Effect specific to oat beta-glucan, not yeast forms. FDA-approved health claim at 3g dose. GI side effects more common with oat forms.
Reduced incidence of colds and respiratory infections
Shorter duration of illness
Lower LDL (oat beta-glucan)
Consult doctor — immune modulation may not be appropriate
May counteract immunosuppressive effects — consult doctor
Tip: Reduce dose; more common with oat beta-glucan
Beta-Glucans is generally well-tolerated and considered safe for most healthy adults at recommended doses. The most commonly reported side effects are bloating/gas. Use caution if any of these apply to you: Known allergy or hypersensitivity to Beta-Glucans or related compounds.
Quercetin
Likely helpsFlavonoid with senolytic and anti-inflammatory properties — supports immune defense, allergy relief, and exercise performance.
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