Maitake Mushroom
Useful mainly for people wanting a beta-glucan mushroom for general immune support, with realistic expectations.
Quick decision guide
May help most
people wanting a beta-glucan mushroom for general immune support, with realistic expectations
Common dosing range
1–3 g/day powder, or 0.5–2 g/day extract
When to expect effects
Weeks
Watch out for
May lower blood glucose; monitor if on diabetes medication
What is it
Maitake (Grifola frondosa), also called hen of the woods, is a culinary and medicinal polypore mushroom native to East Asia, Europe, and North America. It is used as a food and as a source of beta-glucan polysaccharides, especially the D-fraction, for immune and metabolic support.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
immune modulation Limited Evidence | Changes in immune cell activity markers | adults seeking general immune support | Weeks |
immune modulation
- Effect
- Changes in immune cell activity markers
- Best fit
- adults seeking general immune support
- Time
- Weeks
Evidence for 1 use
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
immune modulation
Mechanism onlyMaitake beta-glucans, especially the D-fraction, bind receptors on macrophages and natural killer cells and alter cytokine and immune-cell activity in laboratory and small human studies. These are immune-marker and mechanistic findings rather than demonstrated reductions in infection or illness. Clinical immune benefit is not established.
Bottom line: Beta-glucans plausibly modulate immune-cell activity, but real-world immune benefit is unproven.
How it works
How to take it
What to track
4 commercial forms
Compare the main delivery options and what they’re best suited for.
Maitake D-fraction
Patented liquid extract or capsule form with specific polysaccharide profile used in most clinical research.
Standardized polysaccharide extract; the most studied form for immune effects.
Whole mushroom powder
Closest to consuming the mushroom; convenient for daily use.
Provides full bioactive profile at lower concentration.
SX-fraction
Subfraction marketed for blood sugar support. Less clinical evidence than D-fraction.
Specific extract studied for metabolic effects.
Hot water extract
Common form in capsules and tinctures.
Concentrates polysaccharides; standard extraction method.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Who should avoid it
- pregnant or breastfeeding women
- people on immunosuppressants without medical advice
Pregnancy & breastfeeding
Avoid in pregnancy and breastfeeding due to insufficient safety data.
Interactions
may add to glucose-lowering effects
immune-modulating effects may counteract therapy
possible mild antiplatelet effect
Food sources
| Food | Amount | %DV |
|---|---|---|
| Fresh maitake mushroom (1 cup) | approx 70 grams; provides beta-glucans, vitamin D2 (if UV-exposed), and minerals | — |
| Dried maitake (1 oz) | approx 28 grams dried | — |
Fresh maitake mushroom (1 cup)
- Amount
- approx 70 grams; provides beta-glucans, vitamin D2 (if UV-exposed), and minerals
- %DV
- —
Dried maitake (1 oz)
- Amount
- approx 28 grams dried
- %DV
- —
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
What is maitake D-fraction?⌄
D-fraction is a specific patented beta-glucan extract from maitake mushroom that has been the focus of most immune-related clinical research.
Can maitake help with blood sugar?⌄
Some studies suggest maitake may improve insulin sensitivity and modestly lower blood glucose, but evidence is preliminary. Diabetics taking medication should monitor glucose closely.
Is maitake edible?⌄
Yes, maitake is a popular edible mushroom with a savory flavor and meaty texture. Cooking is recommended for digestibility and flavor.
How long until I see immune effects?⌄
Most clinical trials use 4-12 weeks of consistent daily supplementation before measuring immune outcomes.
Are mushroom supplements as effective as eating the mushroom?⌄
Concentrated extracts deliver higher doses of polysaccharides than typical culinary servings. Both forms have value; extracts are typically used for therapeutic applications.
References by claim
Track Maitake Mushroom with Pilora
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Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.