7 Maitake Mushroom Benefits: What the Research Actually Shows (2026 Update)

The best-studied maitake mushroom benefits are immune support and sharper memory in older adults. Maitake (Grifola frondosa), also called hen of the woods, may help blood sugar and cholesterol too.

Here's the catch. Most benefits of maitake mushroom come from mice, rats or small groups of patients. Even Memorial Sloan Kettering calls the clinical data limited.

So this guide does something different. It rates every benefit by the strength of its research. You'll also get the side effects, drug interactions and a checklist for buying a good supplement.

What Is Maitake Mushroom?

What is maitake? It's an edible, medicinal polypore that grows in big, ruffled clusters at the base of oak trees from September to November. Clusters usually weigh 5 to 10 pounds, and some reach 50, per the Missouri Department of Conservation field guide.

In Japanese, maitake means dancing mushroom. The story goes that foragers danced for joy when they found one. And no, it's not a psychedelic mushroom. It's a culinary and functional mushroom with no psilocybin.

Most of the research focuses on its carbohydrates, which make up 70 to 80% of its dry weight, according to a 2024 review in Heliyon. The compounds you'll see named in studies:

• Beta-glucans: immune-active fibers, including the D-fraction and MD-fraction extracts used in cancer research
• SX-fraction: a glycoprotein extract studied for blood sugar
• Alpha-glucan: another carbohydrate studied for insulin sensitivity in mice

Maitake Nutrition at a Glance

Maitake is low in calories and one of the few foods with a real dose of vitamin D. Here's what 100 g of raw maitake (about 3.5 ounces) gives you, per USDA FoodData Central:

That vitamin D is D2, which mushrooms make when exposed to UV light. So the amount varies with how the maitake was grown. If vitamin D is the reason you're buying, check the package.

7 Maitake Mushroom Benefits and What the Evidence Says

Maitake benefits range from one well-designed human trial to a stack of rat studies. Each benefit below is tagged by study type, so you can judge it for yourself.

Here's how to read the tags:

• Human trial: people compared against a placebo or control group
• Small human study: a few dozen people or fewer, often with no placebo
• Animal or lab: mice, rats or cells, which often don't carry over to people

1. Supports Immune Activity (Small Human Trials)

Maitake appears to adjust the immune system rather than simply boost it. In lab studies, its beta-glucans activate macrophages, natural killer (NK) cells and T cells.

The human data come from two small trials in patients:

• Breast cancer survivors: 34 postmenopausal women took a liquid extract for 3 weeks. Some immune markers rose and others fell, depending on the dose (Deng 2009).
• Myelodysplastic syndrome (MDS): 18 patients who finished a 12-week trial showed better neutrophil and monocyte function. Those are the white blood cells that fight bacteria (Wesa 2015).

Here's the truth: nobody has shown that maitake boosts immunity in healthy adults. The breast cancer researchers even warned that plant extracts can dampen immune activity as well as raise it.

2. May Support Memory in Older Adults (2026 Human Trial)

This is the newest and best-designed maitake study. In a randomized, double-blind, placebo-controlled trial, 47 healthy Japanese adults aged 60 and up ate bread made with 50 g of maitake, or plain bread, every day for 18 weeks (Jogi 2026).

The results:

• One strain, Y10M, raised scores on the Japanese Montreal Cognitive Assessment (MoCA-J) compared with placebo
• The same group had higher NK cell activity, which tracked with better memory scores
• A second strain, C5304, did no better than placebo

Three caveats keep this in the promising column. It's one small trial. It used whole mushrooms in food, not supplements. And two of the authors work for a Japanese maitake producer.

3. May Help Balance Blood Sugar (Early Human Data)

Maitake may lower blood sugar, but the human evidence is thin. In mice, the SX-fraction and an alpha-glucan improved insulin sensitivity and brought blood sugar down.

In people, the data are case reports. A 2020 review of SX-fraction research describes 7 volunteers with type 2 diabetes whose fasting blood sugar fell 30 to 63% over 4 weeks, building on an earlier case report. There was no placebo group, and the author calls for proper clinical trials.

Safety note: that blood sugar drop is also a risk. If you take insulin or other diabetes medication, talk to your doctor before trying maitake supplements.

4. May Support Healthy Cholesterol and Blood Pressure (Animal Studies)

Maitake lowered cholesterol and blood pressure in rats, but no human trial has tested either. In rats on a high-fat diet, maitake polysaccharides cut triglycerides and total cholesterol, partly by shifting gut bacteria and liver genes (Li 2019).

Older studies in rats bred to have high blood pressure found that maitake in their feed kept blood pressure from climbing (Kabir 1987).

Bottom line: interesting rat data, zero human proof. Don't swap maitake for your blood pressure or cholesterol medication.

5. Studied Alongside Cancer Treatment (Not a Cure)

Maitake is not a cancer treatment. Researchers have only tested it as an add-on to standard care, mostly in small groups.

In lab and animal studies, the D-fraction slowed tumor growth. In people, a 2022 randomized trial gave maitake D-fraction to patients with advanced laryngeal and pharyngeal cancers during chemoradiotherapy. They had fewer treatment side effects and a better quality of life (Hu & Xie 2022).

If you're in cancer treatment, talk to your oncologist before taking any supplement. Memorial Sloan Kettering notes that supplements can interact with medications and change how they work.

6. May Support Ovulation in PCOS (Small Human Study)

Maitake extract helped some women with PCOS ovulate, though less often than the fertility drug clomiphene. In a 2010 open-label study, 80 women with PCOS took either a maitake SX-fraction extract or clomiphene for up to 12 weeks (Chen 2010).

This surprised us: adding maitake helped 6 of 8 women who hadn't ovulated on clomiphene alone. Still, there was no placebo and the groups were small. If you're trying to conceive, talk to your fertility doctor first.

7. Feeds Gut Bacteria and Adds Vitamin D (Nutrition + Lab Data)

Maitake is a solid food source of fiber and vitamin D, and its fibers act like prebiotics in lab and animal studies. One 100 g serving gives you 2.7 g of fiber and 140% of the daily value for vitamin D.

In the same rat study on cholesterol, maitake polysaccharides shifted gut bacteria toward a healthier mix (Li 2019). Whether that happens in people isn't known yet.

The best part? This is the one benefit you can get just by cooking dinner.

How Strong Is the Evidence for Each Benefit?

The benefits of maitake mushroom with the best human data are memory and immune activity. Everything else rests on small human studies or animal research, which matches the MSK clinical summary. Here's the full picture, strongest to weakest:

What does that mean for you? Enjoy maitake as a tasty, nutritious food. Treat the supplement claims as maybe, not definitely.

Maitake Mushroom Side Effects and Who Should Avoid It

Maitake mushroom side effects are uncommon when you eat it as food. Supplements are more concentrated, so they carry more risk, mainly through drug interactions.

RxList, which draws on the Natural Medicines database, rates maitake as possibly safe for most adults. It also notes there's little data on side effects. Here's what has shown up so far.

Common Side Effects

Side effects reported in trials are few and mostly mild:

• Stomach upset: mild diarrhea in 2 patients in the MDS trial, and nausea in 1 breast cancer trial participant
• Skin reactions: rash and itching led 1 participant to leave the breast cancer trial
• Higher eosinophils: 4 MDS patients had a rise in this white blood cell type, with no symptoms (MSK)

Fresh maitake is fine for most people once it's cooked. Raw mushrooms are hard to digest, so don't skip the pan.

Drug Interactions

Maitake may interact with three common types of medication. Check with your pharmacist before combining them:

Planning surgery? Stop maitake at least 2 weeks before. It can make blood sugar harder to control during and after the procedure, per RxList.

Who Should Skip Maitake

Skip maitake supplements, or get your doctor's OK first, if you:

• Are pregnant or breastfeeding (there isn't enough safety data)
• Have low blood pressure
• Take warfarin, diabetes medication or blood pressure medication
• Have surgery in the next 2 weeks
• Are allergic to mushrooms

Foraging your own? Make sure you can tell maitake from look-alikes such as the black-staining polypore, which turns black when handled, and Berkeley's polypore (MDC). Our guide on how to spot reishi look-alikes takes the same safety-first approach, and so does our breakdown of lion's mane side effects.

How to Choose a Maitake Mushroom Supplement

The best maitake mushroom supplement is a fruiting-body extract that lists beta-glucans in milligrams and shares a third-party lab report. Sounds simple, right? Plenty of labels still fail at least one of those tests.

You'll find maitake in four main forms:

• Whole powder: dried, ground mushroom that's easy to cook with but less concentrated
• Hot-water extract capsules: concentrated beta-glucans, the form closest to most studies
• Liquid extracts: standardized drops, similar to the extracts used in the immune trials
• Blends: maitake mixed with other mushrooms, so check the milligrams of each one

Your 5-Point Label Checklist

Run through this before you buy any mushroom supplement:

1. Fruiting body, not mycelium on grain. Mycelium grown on rice or oats can be mostly leftover starch.
2. Beta-glucans listed. "Polysaccharides" alone can include that starch.
3. Milligrams per serving. Skip proprietary blends that hide the amounts.
4. A third-party COA. It should cover heavy metals and microbes. Here's what a full lab panel should cover.
5. No disease claims. Supplements can't legally claim to treat or cure disease, so a label that does is a red flag.

Why does this matter? The FDA doesn't approve supplements before they're sold, so the label and the lab report are your main protection.

How much should you take? There's no established dose, per RxList. Studies used very different forms, from small extract doses to 50 g of fresh mushroom a day. Follow the label, and see our reishi dosage guide for how mushroom dosing usually works.

How to Add Maitake to Your Routine

The easiest way to get maitake is to cook it. Fresh maitake tastes rich, earthy and a little peppery, and its frilly edges crisp up fast in a hot pan.

If you'd rather not cook, a supplement is the other route. Either way, give it time: the memory benefit showed up after 18 weeks of daily eating.

Cooking With Fresh Maitake

Look for firm, dry clusters with no slimy spots. Then:

• Store them in a paper bag in the fridge and use them within about a week
• Tear them into bite-size pieces instead of slicing
• Sear in a hot, oiled pan until the edges turn brown and crisp
• Or stir them into soups, ramen and hot pot near the end of cooking

Don't eat it raw. Cooking makes maitake easier to digest, and it tastes a lot better too.

Maitake vs. Reishi, Lion's Mane and Cordyceps

Maitake is mostly studied for immune and blood sugar support, while reishi, lion's mane and cordyceps are better known for rest, focus and energy. HempLucid doesn't sell maitake, but here's how it stacks up against the mushrooms we do use:

Want mushrooms you can actually measure? HempLucid's functional mushroom gummies list every mushroom by the milligram, and every lot is third-party tested. Prefer a CBD pairing? Browse our CBD and mushroom gummies.

Maitake Mushroom FAQ

What is maitake mushroom good for?

Early research points to immune activity, blood sugar and cholesterol. The strongest maitake benefits in people are immune effects in patients and better memory in one 2026 trial of adults over 60.

Most other claims still rest on animal studies.

Is it safe to take maitake every day?

As food, yes for most people. Supplements appeared safe in short trials.

But they can interact with warfarin, diabetes drugs and blood pressure medication, so check with your doctor or pharmacist first.

How long does maitake take to work?

Human studies have lasted 3 to 18 weeks. Immune changes were measured at 12 weeks, and the memory benefit appeared after 18.

For a comparable timeline, see how long reishi takes to work.

Is maitake a psychedelic mushroom?

No. Maitake contains no psilocybin and won't get you high.

It's a culinary and functional mushroom you can often find in Asian and international grocery stores.

Is maitake the same as hen of the woods?

Yes. Maitake, hen of the woods and Grifola frondosa are all the same mushroom.

Don't confuse it with chicken of the woods (Laetiporus), a different, bright orange mushroom.

The Bottom Line

Maitake is a nutritious food with promising but early evidence. The strongest maitake mushroom benefits so far are immune activity in patients and better memory in a single 2026 trial of older adults.

So eat it often if you enjoy it. Talk to a doctor before taking a supplement alongside medication, especially warfarin or diabetes drugs.

What's next? Browse our more mushroom guides to see how maitake compares with reishi, lion's mane and cordyceps. And if a friend keeps asking you about functional mushrooms, send them this guide.

This article is for educational purposes only and is not medical advice. These statements have not been evaluated by the Food and Drug Administration.