Interactions on record — worth a quick check against your medications. Based on 2 of 3 ingredients. Check your meds →
Dietary supplement

Maitake D-Fraction Ingredients & Drug Interactions

by DaVinci Laboratories Of Vermont

Maitake D-Fraction label
See full label image
Capsule Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Maitake D-Fraction 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 D-Fraction is a dietary supplement by DaVinci Laboratories Of Vermont with 3 active ingredients. Its ingredients are commonly taken for common cold and immune support, antioxidant support, skin health and collagen formation.Based on those ingredients, 465 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Maitake PD Fraction(TM) (Grifola frondosa) Extract, Vitamin C. 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 D-Fraction by DaVinci Laboratories Of Vermont

Ask about any prescription or over-the-counter medication and we check it for interactions with Maitake D-Fraction by DaVinci Laboratories Of Vermont — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Maitake D-Fraction by DaVinci Laboratories Of Vermont

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 3 of its 3 active ingredients.
  • “Maitake PD Fraction(TM) (Grifola frondosa) Extract” is listed as a grouped ingredient — the label gives one combined amount (25 mg) without saying how much of each component you get.

This product has 3 active ingredients: vitamin C, a proprietary blend called D-Fraction, maitake mushroom powder, and a maitake extract. Vitamin C is the familiar nutrient that supports immune function and acts as an antioxidant.

Maitake mushroom (Grifola frondosa) is a medicinal fungus traditionally used in Asian medicine; the product includes both a powder form and polysaccharide extracts meant to capture the mushroom's active compounds. The capsule also contains inactive ingredients—rice flour, vegetable cellulose, and vegetable stearate—which are fillers and binders used to hold the capsule together.

Does it work?

Moderate evidence
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
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: supporting the body's immune activity.
  • We looked for evidence on: Acute bronchitis, Allergic rhinitis (hay fever), Atopic disease, Chemotherapy-induced leukopenia, Coronavirus disease 2019 (COVID-19), Exercise-induced respiratory infections — and 4 related terms.
  • The strongest evidence on file: Vitamin C is rated "Possibly Effective" for Exercise-induced respiratory infections (Natural Medicines).
  • Also on file: Vitamin C is rated "Possibly Ineffective" for Acute bronchitis, Helicobacter pylori.
  • Also on file: Vitamin C is rated "Likely Ineffective" for Coronavirus disease 2019 (COVID-19).

The evidence picture is mixed. Vitamin C is established as effective for preventing and treating vitamin C deficiency, and it's possibly effective for anemia of chronic disease, heart rhythm issues, cataracts, and reducing infection risk from intense exercise.

For maitake mushroom, the data we hold doesn't establish its effectiveness—the conditions listed (hay fever allergies, chemotherapy side effects like anemia and diarrhea, laryngeal cancer, and chronic fatigue) all carry insufficient reliable evidence to rate. That means the mushroom's benefits for those uses haven't been proven in our data, though it's been used traditionally.

The evidence, ingredient by ingredient Vitamin C 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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Vitamin C is generally well tolerated at normal doses, but very high doses can cause side effects: stomach cramps, heartburn, diarrhea, nausea, and vomiting are the most common, especially above 2 grams daily. Kidney stones have been reported in people prone to them.

In pregnancy and while breastfeeding, normal amounts from food and prenatal vitamins are fine, but high-dose vitamin C supplements should be avoided unless your doctor directs otherwise. Maitake mushroom is generally well tolerated as food, but concentrated supplements haven't been fully studied for safety.

The most common side effects are gastrointestinal—diarrhea and stomach pain. A small number of trial participants reported nausea, and one experienced a rash and itching that cleared on its own.

Because safety data is limited, concentrated maitake supplements should be avoided during pregnancy and while breastfeeding.

Side effects, ingredient by ingredient Vitamin C 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?
  • 2 of the 2 matched ingredients can interact with medications — Maitake Mushroom, Vitamin C.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; cancer treatments; diabetes medications.
  • For scale: 465 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.

Before taking this, check with your doctor or pharmacist if you take warfarin or other blood thinners—both ingredients interact moderately with them. Also flag blood pressure medications, diabetes drugs, hormonal birth control or hormone replacement, thyroid medication, chemotherapy drugs, HIV protease inhibitors, or aluminum-containing antacids.

The severity ranges from moderate interactions that could change how your drugs work to theoretical risks that need individual review.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

If you take blood pressure pills, diabetes medications, blood thinners, hormonal contraceptives, or thyroid medication, you'll want to review this product with your doctor or pharmacist before starting. Vitamin C at high doses is the biggest interaction concern.

The maitake mushroom inside hasn't been proven effective for the conditions often promoted, though it's generally tolerated. Talk with your own healthcare provider about whether this product is right for you and your medications.

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

Assessment coverage: 2 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 25, 2013.

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 D-Fraction, straight from the product label.

Brand DaVinci Laboratories Of Vermont
Barcode (UPC) 026664271365
Net contents 60 Vegetarian Capsule(s)
Market status On market
Date entered into DSLD Jun 25, 2013
DSLD ID 22882
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years), Gluten 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 D-Fraction by DaVinci Laboratories Of Vermont, 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
UPC/BARCODE
026664271365
IngredientAmount% DV
Vitamin C10 mg17%
D-Fraction(R)7.5 mg--
Maitake PD Fraction(TM) (Grifola frondosa) Extract25 mg--
Maitake Mushroom (Grifola frondosa) Powder250 mg--

Other ingredients: Rice Flour, Vegetable Cellulose, Vegetable Stearate

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.
General Statements

TRUTH We pledge total truth in labeling. Our family of products contain only the purest and most potent ingredients. Guaranteed.

9913900 0613

Brand IP Statement(s)

Maitake D-Fraction(R) is one of the most comprehensive immunostimulants available in the dietary supplement category. Taken daily, Maitake D-Fraction(R) may play a significant role by supporting the body's immune activity.

Maitake PD-Fraction(TM) and D-Fraction(R) are registered trademarks of Maitake Products, Inc.

Formulation

This product is vegetarian and free of citrus, corn, gluten and yeast.

This product is vegetarian and free of citrus, corn, gluten and yeast.

Precautions

Warning: If pregnant or nursing, or taking blood thinning medications, do not take this product without first consulting your health care practitioner.

Caution: Discontinue use 2 weeks prior to surgery.

Keep out of reach of children.

Storage

Store in a cool, dry place.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

General

0200713.060 0110A

FDA Statement of Identity

A Dietary Supplement to Support Immune System Function

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 1 capsule, 1-3 times daily with food, or as directed by your health care practitioner.

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

See for yourself

Maitake D-Fraction by DaVinci Laboratories Of Vermont label

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

Maitake D-Fraction 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 D-Fraction by DaVinci Laboratories Of Vermont

These are the 3 active ingredients this product is made of. Select any to open its full monograph.

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

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Vitamin C

Interacts with
207 drugs
10 mg per serving Form: Ascorbic Acid

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for im...

Vitamin C monograph & interactions

Maitake PD Fraction(TM) (Grifola frondosa) Extract

Interacts with
260 drugs
25 mg per serving

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 PD Fraction(TM) (Grifola frondosa) Extract monograph & interactions
  • › D-Fraction(R)

Maitake Mushroom (Grifola frondosa) Powder

Interacts with
260 drugs
250 mg per serving

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 (Grifola frondosa) Powder monograph & interactions

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

Interaction report

Maitake D-Fraction by DaVinci Laboratories Of Vermont Drug Interactions

Want to check YOUR meds against Maitake D-Fraction?

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
465Drugs
359 Moderate 106 Minor

Ingredients driving the most interactions

Maitake PD Fraction(TM) (Grifola frondosa) Extract 260
Vitamin C 207

Individual Drug Interactions

The ingredients in Maitake D-Fraction interact with 465 drugs. Click any drug to see the details.

2 of the 3 ingredients in Maitake D-Fraction interact with drugs. Each result below shows which ingredient is responsible. Maitake PD Fraction(TM) (Grifola frondosa) Extract Vitamin C

Each ingredient & the kinds of drugs it affects

For each ingredient in Maitake D-Fraction with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Maitake PD Fraction(TM) (Grifola frondosa) 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 PD Fraction(TM) (Grifola frondosa) Extract full monograph & interactions

Vitamin C13 drug types · 207 drugs

Alkylating Agents

Theoretically, antioxidant effects of vitamin C might reduce the effectiveness of alkylating agents.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs that generate free radicals, such as cyclophosphamide, chlorambucil, carmustine, busulfan, and thiotepa. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Aluminum

Vitamin C can increase the amount of aluminum absorbed from aluminum compounds.
Research in animals and humans shows that vitamin C increases aluminum absorption, theoretically by chelating aluminum and keeping it in solution where it is available for absorption. In people with normal renal function, urinary excretion of aluminum will likely increase, making aluminum retention and toxicity unlikely. Patients with renal failure who take aluminum-containing compounds such as phosphate binders should avoid vitamin C supplements in doses above the recommended dietary allowances.

Likelihood Probable Evidence B
Antitumor Antibiotics

Theoretically, the antioxidant effects of vitamin C might reduce the effectiveness of antitumor antibiotics.
The use of antioxidants like vitamin C during chemotherapy is controversial. There is concern that antioxidants could reduce the activity of chemotherapy drugs which generate free radicals, such as doxorubicin. In contrast, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that could interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effects, if any, antioxidants such as vitamin C have on chemotherapy.

Likelihood Possible Evidence D
Estrogens

Vitamin C might increase blood levels of estrogens.
Increases in plasma estrogen levels of up to 55% occur under some circumstances when vitamin C is taken concurrently with oral contraceptives or hormone replacement therapy, including topical products. It is suggested that vitamin C prevents oxidation of estrogen in the tissues, regenerates oxidized estrogen, and reduces sulfate conjugation of estrogen in the gut wall. When tissue levels of vitamin C are high, these processes are already maximized and supplemental vitamin C does not have any effect on estrogen levels. Increases in plasma estrogen levels may occur when patients who are deficient in vitamin C take supplements. Monitor these patients for estrogen-related side effects.

Likelihood Probable Evidence B
Fluphenazine (Prolixin)

Theoretically, vitamin C might decrease levels of fluphenazine.
In one patient there was a clinically significant decrease in fluphenazine levels when vitamin C (500 mg twice daily) was started. The mechanism is not known, and there is no further data to confirm this interaction.

Likelihood Possible Evidence D
Indinavir (Crixivan)

Vitamin C can modestly reduce indinavir levels.
One pharmacokinetic study shows that taking vitamin C 1 gram orally once daily along with indinavir 800 mg orally three times daily reduces the area under the concentration-time curve of indinavir by 14%. The mechanism of this interaction is unknown, but it is unlikely to be clinically significant in most patients. The effect of higher doses of vitamin C on indinavir levels is unknown.

Likelihood Probable Evidence B
Levothyroxine (Synthroid, Others)

Vitamin C can increase levothyroxine absorption.
Two clinical studies in adults with poorly controlled hypothyroidism show that swallowing levothyroxine with a glass of water containing vitamin C 500-1000 mg in solution reduces thyroid stimulating hormone (TSH) levels and increases thyroxine (T4) levels when compared with taking levothyroxine alone. This suggests that vitamin C increases the oral absorption of levothyroxine, possibly due to a reduction in pH.

Likelihood Probable Evidence B
Warfarin (Coumadin)

High-dose vitamin C might reduce the levels and effectiveness of warfarin.
Vitamin C in high doses may cause diarrhea and possibly reduce warfarin absorption. There are reports of two people who took up to 16 grams daily of vitamin C and had a reduction in prothrombin time. Lower doses of 5-10 grams daily can also reduce warfarin absorption. In many cases, this does not seem to be clinically significant. However, a case of warfarin resistance has been reported for a patient who took vitamin C 500 mg twice daily. Cessation of vitamin C supplementation resulted in a rapid increase in international normalized ratio (INR). Tell patients taking warfarin to avoid taking vitamin C in excessively high doses (greater than 10 grams daily). Lower doses may be safe, but the anticoagulation activity of warfarin should be monitored. Patients who are stabilized on warfarin while taking vitamin C should avoid adjusting vitamin C dosage to prevent the possibility of warfarin resistance.

Likelihood Possible Evidence D
Acetaminophen (Tylenol, Others)

High-dose vitamin C might slightly prolong the clearance of acetaminophen.
A small pharmacokinetic study in healthy volunteers shows that taking high-dose vitamin C (3 grams) 1.5 hours after taking acetaminophen 1 gram slightly increases the apparent half-life of acetaminophen from around 2.3 hours to 3.1 hours. Ascorbic acid competitively inhibits sulfate conjugation of acetaminophen. However, to compensate, elimination of acetaminophen glucuronide and unconjugated acetaminophen increases. This effect is not likely to be clinically significant.

Likelihood Probable Evidence B
Aspirin

Acidification of the urine by vitamin C might increase aspirin levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction is not clinically significant.

Likelihood Possible Evidence B
Choline Magnesium Trisalicylate (Trilisate)

Acidification of the urine by vitamin C might increase choline magnesium trisalicylate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams daily of vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
Niacin

Vitamin C might decrease the beneficial effects of niacin on high-density lipoprotein (HDL) cholesterol levels.
A combination of niacin and simvastatin (Zocor) effectively raises HDL cholesterol levels in patients with coronary disease and low HDL levels. Clinical research shows that taking a combination of antioxidants (vitamin C, vitamin E, beta-carotene, and selenium) along with niacin and simvastatin (Zocor) attenuates this rise in HDL, specifically the HDL-2 and apolipoprotein A1 fractions, by more than 50% in patients with coronary disease. It is not known whether this adverse effect is due to a single antioxidant such as vitamin C, or to the combination. It also is not known whether it will occur in other patient populations.

Likelihood Possible Evidence A
Salsalate (Disalcid)

Acidification of the urine by vitamin C might increase salsalate levels.
It has been suggested that acidification of the urine by vitamin C could increase reabsorption of salicylates by the renal tubules, and increase plasma salicylate levels. However, short-term use of up to 6 grams/day vitamin C does not seem to affect urinary pH or salicylate excretion, suggesting this interaction probably is not clinically significant.

Likelihood Possible Evidence B
Vitamin C full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Maitake D-Fraction, from the product label.

DaVinci Laboratories Of Vermont

See all DaVinci Laboratories Of Vermont products
Name
DaVinci Laboratories of Vermont a division of FoodScience Corp.
Street Address
20 New England Drive, Suite 10
City
Essex Junction
State
VT
ZipCode
05452
Web Address
www.davincilabs.com
Pharmacist Counseling Corner

Maitake D-Fraction by DaVinci Laboratories Of Vermont: Common Questions

Does Maitake D-Fraction by DaVinci Laboratories Of Vermont interact with any medications?
Yes. Based on its ingredients, Maitake D-Fraction has a known interaction with 465 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Maitake D-Fraction contains 3 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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.
Does this product actually work for anything?
Vitamin C in this product is proven effective for preventing and treating vitamin C deficiency. It's possibly effective for anemia of chronic disease, heart rhythm problems, cataracts, and reducing infection risk from intense exercise. The maitake mushroom hasn't been established to work for the uses it's often marketed for—the evidence we have is insufficient. If you're considering this mainly for the mushroom, talk it over with your doctor first.
Can I take this while pregnant or breastfeeding?
For vitamin C: normal amounts from food and prenatal vitamins are fine, but avoid high-dose supplements unless your doctor advises otherwise. For maitake mushroom: there isn't enough safety data, so concentrated supplements should be avoided in pregnancy and while breastfeeding. Talk with your doctor or pharmacist about what's right for you.
What side effects might I notice?
Vitamin C can cause stomach cramps, heartburn, diarrhea, nausea, and headache, especially at high doses above 2 grams daily. Maitake mushroom may cause diarrhea, stomach pain, or nausea in some people. Kidney stones are a rare concern with very high vitamin C intake, especially if you're prone to them.
Why does this interact with so many medications?
Vitamin C affects how your body absorbs and processes several drug classes—it can increase estrogen levels, reduce blood thinner effectiveness at high doses, change thyroid medication absorption, and theoretically interfere with certain chemotherapy and antitumor drugs. Maitake mushroom can lower blood pressure and blood sugar, which matters if you're already taking medications for those purposes. These are real pharmacological effects that need monitoring.
Is this safe if I take blood pressure or diabetes medication?
Maitake mushroom may theoretically lower blood pressure and blood sugar further, so if you take medications for either, you need to check with your doctor or pharmacist first. They can tell you whether this product is appropriate for you or if monitoring is needed.

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

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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 D-Fraction label
Go deeper

The Full Monographs Behind Maitake D-Fraction’s Ingredients

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

Herb & supplement monograph

Vitamin C

Interacts with 207 drugs

Vitamin C (ascorbic acid) is an essential nutrient your body needs but cannot make, so you must get it from food or supplements. It's important for immune function, collagen, and acts as an...

Read the full Vitamin C monograph → 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 D-Fraction'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 59 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.

Vitamin C 51 references
  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
  2. Back DJ, Breckenridge AM, MacIver M, et al. Interaction of ethinyloestradiol with ascorbic acid in man. Br Med J (Clin Res Ed) 1981;282:1516.
  3. Morris JC, Beeley L, Ballantine N. Interaction of ethinyloestradiol with ascorbic acid in man [letter]. Br Med J (Clin Res Ed) 1981;283:503.
  4. Labriola D, Livingston R. Possible interactions between dietary antioxidants and chemotherapy. Oncology 1999;13:1003-8.
  5. Dwyer JH, Merz NB, Shirocre AM, et al. Progression of early atherosclerosis and intake of vitamin C and vitamin E from supplements and food. The Los Angeles Atherosclerosis Study. 41st Annual Conference on Cardiovascular Disease Epidemiology and Prevent
  6. Levine M, Rumsey SC, Daruwala R, et al. Criteria and recommendations for vitamin C intake. JAMA 1999;281:1415-23. PubMed
  7. Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
  8. Segal S, Kaminski S. Drug-nutrient interactions. American Druggist 1996 Jul;42-8.
  9. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, DC: National Academy Press, 2000. Available at: http://www.nap.edu/books/0309069351/html/.
  10. Houston JB, Levy G. Drug biotransformation interactions in man VI: Acetaminophen and ascorbic acid. J Pharm Sci 1976;65:1218-21. PubMed
  11. Brown BG, Zhao XQ, Chait A, et al. Simvastatin and niacin, antioxidant vitamins, or the combination for the prevention of coronary disease. N Engl J Med 2001;345:1583-93. DOI
  12. Rosenthal G. Interaction of ascorbic acid and warfarin. JAMA 1971;215:1671. DOI
  13. Hume R, Johnstone JM, Weyers E. Interaction of ascorbic acid and warfarin. JAMA 1972;219:1479. DOI
  14. Smith EC, Skalski RJ, Johnson GC, Rossi GV. Interaction of ascorbic acid and warfarin. JAMA 1972;221:1166. DOI
  15. Traxer O, Huet B, Poindexter J, et al. Effect of ascorbic acid consumption on urinary stone risk factors. J Urol 2003;170:397-401.. PubMed
  16. Domingo JL, Gomez M, Llobet JM, Richart C. Effect of ascorbic acid on gastrointestinal aluminum absorption (letter). Lancet 1991;338:1467.
  17. Domingo JL, Gomez M, Llobet JM, Corbella J. Influence of some dietary constituents on aluminum absorption and retention in rats. Kidney Int 1991;39:598-601. PubMed
  18. Partridge NA, Regnier FE, White JL, Hem SL. Influence of dietary constituents on intestinal absorption of aluminum. Kidney Int 1989;35:1413-7. PubMed
  19. Mc Leod DC, Nahata MC. Inefficacy of ascorbic acid as a urinary acidifier (letter). N Engl J Med 1977;296:1413. DOI
  20. Hansten PD, Hayton WL. Effect of antacid and ascorbic acid on serum salicylate concentration. J Clin Pharmacol 1980;20:326-31. PubMed
  21. Dysken MW, Cumming RJ, Channon RA, Davis JM. Drug interaction between ascorbic acid and fluphenazine. JAMA 1979;241:2008. DOI
  22. Vihtamaki T, Parantainen J, Koivisto AM, et al. Oral ascorbic acid increases plasma oestradiol during postmenopausal hormone replacement therapy. Maturitas 2002;42:129-35. PubMed
  23. Slain D, Amsden JR, Khakoo RA, et al. Effect of high-dose vitamin C on the steady-state pharmacokinetics of the protease inhibitor indinavir in healthy volunteers. Pharmacotherapy 2005;25:165-70. PubMed
  24. Cheung MC, Zhao XQ, Chait A, et al. Antioxidant supplements block the response of HDL to simvastatin-niacin therapy in patients with coronary artery disease and low HDL. Arterioscler Thromb Vasc Biol 2001;21:1320-6. PubMed
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See these in context on the Vitamin C monograph →

Maitake Mushroom 8 references
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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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