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Dietary supplement

Maitake Mushroom Extract 650 mg Ingredients & Drug Interactions

by Barlowe's Herbal Elixirs

Maitake Mushroom Extract 650 mg label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Maitake Mushroom Extract 650 mg against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Maitake Mushroom Extract 650 mg is a dietary supplement by Barlowe's Herbal Elixirs with 1 active ingredient. Its ingredients are commonly taken for immune support, blood sugar support in diabetes, high blood pressure.Based on those ingredients, 260 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Maitake Mushroom Fruiting Body Extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs

Ask about any prescription or over-the-counter medication and we check it for interactions with Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Aug 20, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: maitake mushroom fruiting body extract, 650 mg per capsule. The extract is the concentrated form of maitake — also called hen-of-the-woods — a medicinal mushroom used in traditional and modern herbal practice.

The capsule also contains cellulose, an inert filler.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Maitake Mushroom product and its label doesn't state a use — see Maitake Mushroom's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence for maitake mushroom in the conditions we have data for is not yet strong enough to rate. Allergic rhinitis (hay fever), chemotherapy-induced anemia, laryngeal cancer, and chemotherapy-induced diarrhea all carry insufficient reliable evidence ratings.

That means studies so far haven't provided enough good proof that it works for these uses — not that it doesn't work, just that we don't have the data yet to say.

The evidence, ingredient by ingredient Maitake Mushroom

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Maitake mushroom extract is generally well tolerated when eaten as food. As a concentrated supplement, safety hasn't been fully studied, so you should be aware of what's been reported.

In clinical trials, the most common side effects were gastrointestinal — diarrhea and stomach pain (epigastric pain). A small number of participants also reported nausea, and one person experienced a rash and itching (pruritus) that cleared on its own.

During pregnancy and breastfeeding, there isn't enough safety data on concentrated maitake supplements, so the safety data advises against their use. Talk with your doctor or pharmacist about whether this product is right for you if you're pregnant or nursing.

Side effects, ingredient by ingredient Maitake Mushroom

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Maitake Mushroom.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; diabetes medications.
  • For scale: 260 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check your medications against this product before taking it, especially if you're on warfarin (Coumadin) or any blood thinner, any antihypertensive drug (blood pressure medication), or any antidiabetes drug (blood sugar medication). Maitake may enhance the effects of all three categories, raising your risk of bleeding, low blood pressure, or low blood sugar.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Maitake mushroom extract may be worth trying if you're interested in traditional mushroom supplements and have no blood pressure, blood sugar, or blood-thinning medications on board. If you take any antihypertensive drugs, antidiabetes drugs, or warfarin, you need to check with your doctor or pharmacist before starting.

Stomach upset is the most common side effect you might notice.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Feb 22, 2024.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Maitake Mushroom Extract 650 mg, straight from the product label.

Brand Barlowe's Herbal Elixirs
Net contents 60 Vegi-Capsule(s)
Market status On market
Date entered into DSLD Feb 22, 2024
DSLD ID 307174
Product type Botanical
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years), Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
60
IngredientAmount% DV
Maitake Mushroom Fruiting Body Extract650 mg--

Other ingredients: Cellulose

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formulation

No stearates! No fillers, soy, corn, rice, wheat, yeast, dairy, artificial colors or flavors, or titanium dioxide. Non-GMO.

May help increase health and vitality.

Vegetarian standardized extract

General Statements

For more information call 954-479-4320 or go to BarlowesHerbalElixirs.com.

FDA Disclaimer Statement

This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Formula

50% polysaccharides

Suggested/Recommended/Usage/Directions

Directions: As a dietary supplement, take one capsule twice daily without food.

Precautions

Warning: Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Maitake Mushroom Extract 650 mg label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Maitake Mushroom Fruiting Body Extract

Interacts with
260 drugs
650 mg per serving Form: Polysaccharides

Maitake is an edible mushroom long used as food and in traditional Japanese medicine, and it is being studied for possible immune, blood sugar, and bl...

Maitake Mushroom Fruiting Body Extract monograph & interactions

Other (inactive) ingredients: Cellulose. These complete the product’s ingredient list but are not active constituents.

Interaction report

Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs Drug Interactions

Want to check YOUR meds against Maitake Mushroom Extract 650 mg?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
260Drugs
260 Moderate

Ingredients driving the most interactions

Maitake Mushroom Fruiting Body Extract 260

Individual Drug Interactions

The ingredients in Maitake Mushroom Extract 650 mg interact with 260 drugs. Click any drug to see the details.

1 of the 1 ingredient in Maitake Mushroom Extract 650 mg interact with drugs. Each result below shows which ingredient is responsible. Maitake Mushroom Fruiting Body Extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Maitake Mushroom Extract 650 mg with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Maitake Mushroom Fruiting Body Extract3 drug types · 260 drugs

Antidiabetes Drugs

Theoretically, combining maitake mushroom with antidiabetes drugs might increase the risk of hypoglycemia.
Clinical research shows that taking maitake mushroom polysaccharide (MMP) can lower blood glucose levels in patients with types 2 diabetes.

Likelihood Possible Evidence B
Antihypertensive Drugs

Theoretically, combining maitake mushroom with antihypertensive drugs might increase the risk of hypotension.
Animal research shows that maitake mushroom can lower blood pressure.

Likelihood Possible Evidence D
Warfarin (Coumadin)

There is limited evidence that maitake mushroom may increase the anticoagulant effects of warfarin.
In a case report, a patient previously stabilized on warfarin developed an elevated international normalized ratio (INR) of 5.1 after taking maitake mushroom (Grifron-Pro Maitake D-Fraction) 1 drop/kg daily in three divided doses for one week. The elevated INR resolved after holding warfarin for two days, then reducing the dose by 11%. It is thought that the beta-glucan constituent of maitake mushroom might cause warfarin dissociation from proteins, resulting in increased free warfarin levels and increased warfarin effects.

Likelihood Possible Evidence D
Maitake Mushroom Fruiting Body Extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Maitake Mushroom Extract 650 mg, from the product label.

Barlowe's Herbal Elixirs

See all Barlowe's Herbal Elixirs products
Name
Barlowe's Herbal Elixirs LLC
Street Address
7933 SW Jack James Drive
City
Stuart
State
FL
ZipCode
34997
Phone Number
954-479-4320
Web Address
BarlowesHerbalElixirs.com
Pharmacist Counseling Corner

Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs: Common Questions

Does Maitake Mushroom Extract 650 mg by Barlowe's Herbal Elixirs interact with any medications?
Yes. Based on its ingredients, Maitake Mushroom Extract 650 mg has a known interaction with 260 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Maitake Mushroom Extract 650 mg contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
What is maitake mushroom?
Maitake is a medicinal mushroom — also called hen-of-the-woods — used in traditional herbal practice. This product uses an extract of the fruiting body, the part of the mushroom that grows above ground.
Does maitake actually work for anything?
The evidence so far isn't solid enough to rate. Maitake has been studied for hay fever, cancer-related side effects, and chronic fatigue, but we don't have reliable proof yet that it works for these uses.
What side effects should I watch for?
Stomach upset is the most common — diarrhea, stomach pain, and nausea have all been reported in trials. A small number of people also reported rash and itching. Stop and tell your doctor if side effects are bothersome or won't go away.
Can I take this while pregnant or breastfeeding?
There isn't enough safety data on concentrated maitake supplements during pregnancy or breastfeeding. Talk with your doctor or pharmacist before taking it if you're pregnant, planning pregnancy, or nursing.
What's in the capsule besides the mushroom extract?
The only other ingredient is cellulose, a plant-based filler used to fill out the capsule. There are no other actives.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Maitake Mushroom Extract 650 mg is safe with your meds?

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Maitake Mushroom Extract 650 mg label
Go deeper

The Full Monographs Behind Maitake Mushroom Extract 650 mg’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Maitake Mushroom

Interacts with 260 drugs

Maitake is an edible mushroom long used as food and in traditional Japanese medicine, and it is being studied for possible immune, blood sugar, and blood pressure effects. The human evidence...

Read the full Maitake Mushroom monograph →
Sources

Sources & How We Checked

Maitake Mushroom Extract 650 mg's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 8 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Maitake Mushroom 8 references
  1. Kabir Y, Kimura S. Dietary mushrooms reduce blood pressure in spontaneously hypertensive rats (SHR). J Nutr Sci Vitaminol (Tokyo) 1989;35:91-4. PubMed
  2. Kabir Y, Yamaguchi M, Kimura S. Effect of shiitake (Lentinus edodes) and maitake (Grifola frondosa) mushrooms on blood pressure and plasma lipids of spontaneously hypertensive rats. J Nutr Sci Vitaminol (Tokyo) 1987;33:341-6. PubMed
  3. Konno S, Tortorelis DG, Fullerton SA, et al. A possible hypoglycaemic effect of maitake mushroom on Type 2 diabetic patients. Diabet Med 2001;18:1010. PubMed
  4. Chen JT, Tominaga K, Sato Y, et al. Maitake mushroom (Grifola frondosa) extract induces ovulation in patients with polycystic ovary syndrome: a possible monotherapy and a combination therapy after failure with first-line clomiphene citrate. J Altern Compl
  5. Hanselin MR, Vande Griend JP, Linnebur SA. INR elevation with maitake extract in combination with warfarin. Ann Pharmacother 2010;44:223-4. PubMed
  6. Talpur, N. A., Echard, B. W., Fan, A. Y., Jaffari, O., Bagchi, D., and Preuss, H. G. Antihypertensive and metabolic effects of whole Maitake mushroom powder and its fractions in two rat strains. Mol.Cell Biochem. 2002;237(1-2):129-136. PubMed
  7. Deng, G., Lin, H., Seidman, A., Fornier, M., D'Andrea, G., Wesa, K., Yeung, S., Cunningham-Rundles, S., Vickers, A. J., and Cassileth, B. A phase I/II trial of a polysaccharide extract from Grifola frondosa (Maitake mushroom) in breast cancer patients: i
  8. Wesa KM, Cunningham-Rundles S, Klimek VM, et al. Maitake mushroom extract in myelodysplastic syndromes (MDS): a phase II study. Cancer Immunol Immunother 2015;64(2):237-47. PubMed

See these in context on the Maitake Mushroom monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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