Beta-Glucan

Powerful soluble fiber with proven cardiovascular, immune, and metabolic benefits, found in oats, barley, and medicinal mushrooms

Scientific nameβ-Glucan polysaccharide Formula(C6H10O5)n Molecular weightVariable (100,000-2,000,000 g/mol) g/mol CAS9041-22-9

95 absorption score

9 safety / 10

35 USD per month

6 documented interactions

Check it against something

Evidence level B

Beta-Glucan with:

78 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Cholesterol reduction and cardiovascular health

Significantly lowers LDL cholesterol and reduces cardiovascular risk

Binds bile acids, increases cholesterol excretion, and forms viscous gel Evidence A-grade 3-6 weeks for cholesterol benefits

Blood sugar control and diabetes management

Improves glucose control and insulin sensitivity

Slows glucose absorption, reduces post-meal blood sugar spikes Evidence A-grade 2-4 weeks for blood sugar benefits

Immune system enhancement and support

Strengthens immune function and enhances resistance to infections

Activates immune cells, enhances macrophage and natural killer cell activity Evidence B-grade 4-8 weeks for immune benefits

Weight management and satiety support

Promotes feeling of fullness and may support healthy weight

Increases satiety, slows gastric emptying, reduces caloric intake Evidence B-grade 2-8 weeks for weight management effects

Digestive health and gut microbiome support

Supports healthy digestion and beneficial gut bacteria

Prebiotic effects, SCFA production, improved gut barrier function Evidence B-grade 2-6 weeks for digestive benefits

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Probiotics for Autoimmune Disease Support Gut health & immune modulation 10-100 billion CFU daily B 60% Magnesium Glycinate Superior absorption sleep & muscle support 200-600 mg A 90% Coenzyme Q10 (CoQ10) Heart health & cellular energy 100-200mg A 10% Vitamin D3 Bone health & immune support 1000-2000 IU A 85% Magnesium Citrate Balanced absorption & digestive support 300-600 mg A 35% Fish Oil (EPA/DHA) Heart & brain health 1-2g EPA/DHA A 85%

Every pair we checked

12 combinations scored by the engine

Beta-Glucan + Caffeine No documented interaction either way No known interaction 70

Beta-Glucan + Creatine Monohydrate No documented interaction either way No known interaction 70

Beta-Glucan + Calcium Carbonate No documented interaction either way No known interaction 70

Beta-Glucan + Whey Protein No documented interaction either way No known interaction 70

Beta-Glucan + Lactase No documented interaction either way No known interaction 70

Beta-Glucan + Bovine Collagen No documented interaction either way No known interaction 70

Beta-Glucan + DHA No documented interaction either way No known interaction 70

Beta-Glucan + Turmeric No documented interaction either way No known interaction 70

Beta-Glucan + Fish Oil (EPA/DHA) No documented interaction either way No known interaction 70

Beta-Glucan + Magnesium Oxide No documented interaction either way No known interaction 70

Beta-Glucan + Vitamin D3 Enhanced immune benefits and antioxidant protection Works better together 78

Beta-Glucan + Plant Collagen Additive cholesterol-lowering effects Works better together 82

Dosage

With meals plenty water

Daily3-10 g (oat) or 250-500 mg (mushroom)

Cholesterol management3-10 g daily (oat/barley)

Blood sugar control3-6 g daily with meals

Immune support250-500 mg daily (mushroom/yeast)

Weight management3-6 g daily before meals

When to expect it

First Effects1-2 weeks for initial cholesterol and blood sugar effects

Peak Benefits4-8 weeks for maximum cardiovascular and immune benefits

Deficiency DevelopmentNot essential - but inadequate fiber may cause poor health

Toxicity OnsetVery safe - minimal adverse effects even long-term

How to measure it

$100-200

MarkerLipid panel, blood glucose, HbA1c, immune markers

OptimalLDL <100 mg/dL, fasting glucose <100 mg/dL, HbA1c <5.7%

Deficient belowNot applicable - not essential nutrient

FrequencyMonitor lipids and glucose every 6-12 weeks during supplementation

What people actually reported to the FDA

CAERS, 1 reports naming it as the suspect

Most reported effects

Alanine aminotransferase increased 1

Aspartate aminotransferase increased 1

Asthenia 1

Blood alkaline phosphatase increased 1

Blood bilirubin increased 1

Named as the suspect 1 reports of 3 that mention it at all

Serious outcome 50% hospitalisation, emergency room or worse

Hospitalization1

Visited a Health Care Provider1

Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →

What actually reaches you

The label counts the carrier, your body does not

Absorption Very high 95 of 100 · best absorbed form of this compound

Delivered daily 181212.5 mg

Cost per 100 mg delivered $0.00 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Other Soluble Fibers

Enhanced cholesterol reduction and digestive benefits

Multiple fibers provide comprehensive cholesterol binding · level A

Plant Sterols

Additive cholesterol-lowering effects

Complementary mechanisms for cholesterol reduction · level A

Vitamin C

Enhanced immune benefits and antioxidant protection

Both support immune function through different pathways · level B

What not to take with Beta-Glucan

3 documented

Refined Carbohydrates

High sugar intake may counteract blood sugar benefits

Refined carbs cause rapid glucose spikes opposing beta-glucan effects · moderate significance

High Fat Diet

Excessive fat may reduce cholesterol-binding effectiveness

High fat intake may overwhelm cholesterol-binding capacity · minor significance

Alcohol Excess

Excessive alcohol may impair immune and metabolic benefits

Alcohol affects immune function and glucose metabolism · moderate significance

Medication interactions

Discuss these with a pharmacist before combining

diabetes-medications Moderate

May enhance blood sugar lowering effects

What to do: Monitor blood glucose closely and adjust medications

cholesterol-medications Beneficial

May provide additive cholesterol-lowering benefits

What to do: Monitor cholesterol levels and medication effectiveness

immunosuppressive-medications Minor

Immune-enhancing effects may counteract immunosuppression

What to do: Consult healthcare provider before use

Available forms

bioavailability compared

Oat beta-glucan 95

Barley beta-glucan 90

Mushroom beta-glucan (1,3-1,6) 85

Yeast beta-glucan 80

Oat beta-glucan: FDA approved, Extensive research, Cholesterol benefits, Natural source

Barley beta-glucan: Similar to oat, Good cholesterol benefits, Natural source, Traditional use

Mushroom beta-glucan (1,3-1,6): Immune benefits, Lower doses needed, Unique properties, Well-researched

Yeast beta-glucan: Immune support, Moderate cost, Good research, Stable form

Food sources

before you supplement

Oats and oat bran 3-8% beta-glucan content · 95

Barley 2-5% beta-glucan content · 90

Mushrooms (shiitake, maitake, reishi) Variable amounts of 1,3-1,6 beta-glucan · 80

Beta-glucan supplements 250mg-10g per serving depending on source · 80-95

Too little

deficiency signs

Beta-glucan is not essential but inadequate intake may cause:
Elevated cholesterol levels and increased cardiovascular risk
Poor blood sugar control and insulin resistance
Compromised immune function and increased infection susceptibility
Reduced satiety and potential overeating
Poor gut health and microbiome imbalance
Increased inflammation and oxidative stress

Too much

toxicity signs

Beta-glucan is very safe with minimal toxicity:
Mild digestive upset including bloating and gas
Potential hypoglycemia in diabetics with high doses
Rare allergic reactions in sensitive individuals
Generally well-tolerated even at therapeutic doses

Who benefits most

high-cholesterol-cardiovascular-risk

FDA-approved cholesterol reduction and proven cardiovascular benefits

3-10 g daily with meals

diabetes-blood-sugar-management

Proven benefits for blood sugar control and insulin sensitivity

3-6 g daily with meals

immune-system-support

Enhances immune function and resistance to infections

250-500 mg daily (mushroom beta-glucan)

weight-management-satiety

Supports healthy weight through increased satiety

3-6 g daily before meals

digestive-health-optimization

Supports gut health and beneficial microbiome

3-10 g daily

Where to buy it

compare forms first

Look for Beta-Glucan at 3-10 g (oat) or 250-500 mg (mushroom) per serving. The form that matters here is Oat beta-glucan.

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What else affects it

Beyond other supplements

Refined carbohydrates

High sugar intake may counteract blood sugar benefits

Refined carbs cause rapid glucose spikes opposing beta-glucan effects

High fat diet

Excessive fat may reduce cholesterol-binding effectiveness

High fat intake may overwhelm cholesterol-binding capacity

Alcohol excess

Excessive alcohol may impair immune and metabolic benefits

Alcohol affects immune function and glucose metabolism

How it works

Forms viscous gel in digestive tract binding bile acids and cholesterol
Slows glucose absorption reducing post-meal blood sugar spikes
Activates immune cells including macrophages and dendritic cells
Binds to complement receptor 3 (CR3) on immune cells enhancing function
Increases satiety hormones and delays gastric emptying
Serves as prebiotic fiber supporting beneficial gut bacteria

Key findings

what the evidence supports

FDA-approved health claim for cholesterol reduction
Strong evidence for blood sugar control and diabetes management
Proven immune enhancement effects, particularly from mushroom sources
Excellent safety profile with minimal adverse effects

Sources: NIH Examine.com · data reviewed 2026-08-02

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Beta-Glucan?

Documented effects: Cholesterol reduction and cardiovascular health; Blood sugar control and diabetes management; Immune system enhancement and support; Weight management and satiety support. Significantly lowers LDL cholesterol and reduces cardiovascular risk

How much Beta-Glucan should you take per day?

The common daily range is 3-10 g (oat) or 250-500 mg (mushroom). By goal — cholesterol management: 3-10 g daily (oat/barley); blood sugar control: 3-6 g daily with meals; immune support: 250-500 mg daily (mushroom/yeast); weight management: 3-6 g daily before meals.

When is the best time to take Beta-Glucan?

With meals plenty water. First effects are typically reported within 1-2 weeks for initial cholesterol and blood sugar effects.

What are the side effects of Beta-Glucan?

At excessive doses: Beta-glucan is very safe with minimal toxicity:, Mild digestive upset including bloating and gas, Potential hypoglycemia in diabetics with high doses, Rare allergic reactions in sensitive individuals, Generally well-tolerated even at therapeutic doses. Safety rating at normal doses is 9 out of 10.

What should you not take with Beta-Glucan?

Separate it from Refined Carbohydrates, High Fat Diet, Alcohol Excess by two to four hours. High sugar intake may counteract blood sugar benefits

Does Beta-Glucan interact with medications?

Documented interactions with diabetes-medications, cholesterol-medications, immunosuppressive-medications. Discuss these with a pharmacist before combining.

How do you know if you need Beta-Glucan?

The marker is Lipid panel, blood glucose, HbA1c, immune markers, optimal range LDL <100 mg/dL, fasting glucose <100 mg/dL, HbA1c <5.7%. Common deficiency signs: Beta-glucan is not essential but inadequate intake may cause:, Elevated cholesterol levels and increased cardiovascular risk, Poor blood sugar control and insulin resistance, Compromised immune function and increased infection susceptibility.

Taken for

59 Immunity

Vitamin D3 · Vitamin C (Ascorbic Acid) · Comprehensive Immune Support Complex

52 Heart

Fish Oil (EPA/DHA) · EPA · Olive Oil Extract

74 Digestion

Lactase · Lactobacillus acidophilus · Protease