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Dietary supplement

Chaga 1000 mg Ingredients & Drug Interactions

by Double Wood Supplements

Chaga 1000 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 Chaga 1000 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

Chaga 1000 mg is a dietary supplement by Double Wood Supplements with 1 active ingredient. Its ingredients are commonly taken for immune support, antioxidant support, general wellness/tonic.Based on those ingredients, 327 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Chaga Mushroom. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Chaga 1000 mg by Double Wood Supplements

Ask about any prescription or over-the-counter medication and we check it for interactions with Chaga 1000 mg by Double Wood Supplements — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Chaga 1000 mg by Double Wood Supplements

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 Jul 11, 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: chaga mushroom extract at 1000 mg per capsule. Chaga is a fungus that grows on birch trees and has been used traditionally in teas and food.

The remaining ingredients — hypromellose, rice flour, and microcrystalline cellulose — are inactive binders and fillers that hold the capsule together.

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

We hold no graded evidence for this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: immune support and antioxidant wellness.
  • We looked for evidence on: Immune function, Antioxidant defense, General wellness.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

The evidence for chaga isn't established yet. We have insufficient reliable evidence to rate its use for cardiovascular disease, diabetes, or COVID-19.

While chaga has a long history in traditional preparations, clinical trials in people haven't proven it works for these conditions. If you're considering chaga for a specific health goal, talk with your pharmacist or doctor about whether the current evidence supports it.

The evidence, ingredient by ingredient Chaga

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.

Chaga is generally well tolerated when used in traditional foods and teas, but human safety data are limited. The main concern is that chaga contains high concentrations of oxalate — a compound that can build up in your kidneys.

There have been a few reported cases of kidney failure and kidney injury linked to excessive chaga consumption. For pregnancy and breastfeeding, there isn't enough safety information; the data advises against use in both situations.

If you're pregnant, planning pregnancy, or breastfeeding, talk with your doctor before taking this product.

Side effects, ingredient by ingredient Chaga

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 — Chaga.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications.
  • For scale: 327 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.

Double-check this product if you take blood thinners or antiplatelet drugs (warfarin, aspirin, clopidogrel), immunosuppressants (tacrolimus, mycophenolate), or diabetes medications (insulin, metformin, sulfonylureas). All three categories interact at Moderate severity, and chaga may change how these drugs work or increase your risk of bleeding 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.

Chaga may be worth considering if you're interested in traditional mushroom supplements and don't take blood thinners, immunosuppressants, or diabetes medications. If you do take any of those, check your exact medications with the tool on this page before starting.

Because kidney concerns exist with high doses, stick to the recommended dose and talk with your pharmacist if you have any kidney issues.

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 Jul 25, 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 Chaga 1000 mg, straight from the product label.

Brand Double Wood Supplements
Barcode (UPC) 850033272161
Net contents 120 Capsule(s)
Market status On market
Date entered into DSLD Jul 25, 2024
DSLD ID 315596
Product type Botanical
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), 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 Chaga 1000 mg by Double Wood Supplements, 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:
2 Capsule(s)
Maximum serving Sizes:
2 Capsule(s)
Servings per container
60
UPC/BARCODE
850033272161
IngredientAmount% DV
Chaga Mushroom1000 mg--

Other ingredients: Hypromellose, Rice Flour, Microcrystalline 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.
Formula

Product Info: Chaga mushrooms are rich in a wide variety of vitamins and minerals and is considered to be a superfood. Chaga mushroom powder contains amino acids, vitamin D, copper, zinc, selenium, iron, magnesium, calcium, and other nutrients.

Chaga 1000 mg per serving

Suggested/Recommended/Usage/Directions

Suggested Use: Take 2 capsules per day, with or without food.

Storage

Storage: Store in a cool, dark place. Do not freeze or expose to moisture or heat above room temperature.

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.

Seals/Symbols

Proudly Made In USA

Formulation

Made with Non-GMO Ingredients Gluten Free

FDA Statement of Identity

Dietary Supplement

Precautions

Warning: Consult your physician before use.

Do not use Chaga Mushroom if you are pregnant, nursing, or under 18 years of age.

Do not use Chaga Mushroom if you are pregnant, nursing, or under 18 years of age.

Discontinue use and consult your doctor immediately if any adverse reactions occur. Do not use Chaga Mushroom and operate heavy machinery until you know how it affects you.

Keep out of reach of children.

Do not exceed 4 capsules per day.

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

See for yourself

Chaga 1000 mg by Double Wood Supplements label

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

Chaga 1000 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 Chaga 1000 mg by Double Wood Supplements

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

Serving size2 Capsule(s) Dosage formCapsule Servings per container60 Amounts shown are per serving.

Chaga Mushroom

Interacts with
327 drugs
1000 mg per serving

Chaga is a fungus that grows mostly on birch trees and is used as a tea or supplement, mainly for immune and antioxidant support. Human evidence for i...

Chaga Mushroom monograph & interactions

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

Interaction report

Chaga 1000 mg by Double Wood Supplements Drug Interactions

Want to check YOUR meds against Chaga 1000 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
327Drugs
327 Moderate

Ingredients driving the most interactions

Chaga Mushroom 327

Individual Drug Interactions

The ingredients in Chaga 1000 mg interact with 327 drugs. Click any drug to see the details.

1 of the 1 ingredient in Chaga 1000 mg interact with drugs. Each result below shows which ingredient is responsible. Chaga Mushroom

Each ingredient & the kinds of drugs it affects

For each ingredient in Chaga 1000 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.

Chaga Mushroom3 drug types · 327 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, chaga may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro and animal research suggests that chaga extract can inhibit platelet aggregation. This effect has not been reported in humans.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, taking chaga with antidiabetes drugs might increase the risk of hypoglycemia.
Animal research suggests that chaga might decrease blood glucose levels and increase insulin levels. This has not been reported in humans.

Likelihood Possible Evidence D
Immunosuppressants

Theoretically, chaga might interfere with immunosuppressive therapy.
In vitro research suggests that certain constituents of chaga stimulate immune function. This has not been reported in humans.

Likelihood Possible Evidence D
Chaga Mushroom full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Chaga 1000 mg, from the product label.

Double Wood Supplements

See all Double Wood Supplements products
Name
Double Wood LLC
Street Address
3510 Scotts Ln Ste 219
City
Philadelphia
State
PA
ZipCode
19129-15173
Web Address
www.doublewoodsupplements.com
Pharmacist Counseling Corner

Chaga 1000 mg by Double Wood Supplements: Common Questions

Does Chaga 1000 mg by Double Wood Supplements interact with any medications?
Yes. Based on its ingredients, Chaga 1000 mg has a known interaction with 327 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Chaga 1000 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.
Can I take Chaga with blood thinners like warfarin?
Not without checking with your pharmacist first. Animal studies suggest chaga may reduce clotting, which could increase bleeding risk if you're on warfarin or similar drugs. This hasn't been proven in people yet, but the interaction is rated Moderate — worth taking seriously.
Does chaga actually work for heart health or diabetes?
We don't have enough reliable evidence to say. The data we hold rates both cardiovascular disease and diabetes as 'insufficient evidence.' Chaga has a long traditional history, but clinical trials haven't proven it yet.
Is chaga safe to take during pregnancy?
No — there isn't enough safety information. The data advises against use during pregnancy. If you're pregnant or planning to be, talk with your doctor before starting this supplement.
What are the side effects of chaga?
Most people tolerate it well, but there have been rare cases of kidney problems — including kidney failure — linked to very high chaga doses. This is because chaga contains high levels of oxalate, which can build up in your kidneys. Stick to the recommended dose and let your pharmacist know if you have any kidney concerns.
Can I take chaga if I take immune-suppressing drugs after a transplant?
Probably not without your doctor's approval. Lab research suggests chaga may boost immune function, which could interfere with transplant medications. This hasn't been seen in humans, but it's a Moderate interaction worth discussing with your prescriber.

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

Not sure if Chaga 1000 mg is safe with your meds?

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Ask a pharmacist

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.

Chaga 1000 mg label
Go deeper

The Full Monographs Behind Chaga 1000 mg’s Ingredients

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

Herb & supplement monograph

Chaga

Interacts with 327 drugs

Chaga is a fungus that grows mostly on birch trees and is used as a tea or supplement, mainly for immune and antioxidant support. Human evidence for its benefits is very limited, and it may...

Read the full Chaga monograph →
Sources

Sources & How We Checked

Chaga 1000 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 9 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.

Chaga 9 references
  1. Sun JE, Ao ZH, Lu ZM, et al. Antihyperglycemic and antilipidperoxidative effects of dry matter of culture broth of Inonotus obliquus in submerged culture on normal and alloxan-diabetes mice. J Ethnopharmacol 2008;118(1):7-13. PubMed
  2. Hyun KW, Jeong SC, Lee DH, et al. Isolation and characterization of a novel platelet aggregation inhibitory peptide from the medicinal mushroom, Inonotus obliquus. Peptides 2006;27(6):1173-8. PubMed
  3. Kim YO, Han SB, Lee HW, et al. Immuno-stimulating effect of the endo-polysaccharide produced by submerged culture of Inonotus obliquus. Life Sci 2005;77(19):2438-56. PubMed
  4. Kikuchi Y, Seta K, Ogawa Y, et al. Chaga mushroom-induced oxalate nephropathy. Clin Nephrol 2014;81(6):440-4. PubMed
  5. Lee S, Lee HY, Park Y, et al. Development of end stage renal disease after long-term ingestion of chaga mushroom: case report and review of literature. J Korean Med Sci. 2020;35(19):e122.
  6. Kwon O, Kim Y, Paek JH, et al. Chaga mushroom-induced oxalate nephropathy that clinically manifested as nephrotic syndrome: A case report. Medicine (Baltimore) 2022;101(10):e28997. PubMed
  7. Su L, Xin C, Yang J, et al. A polysaccharide from Inonotus obliquus ameliorates intestinal barrier dysfunction in mice with type 2 diabetes mellitus. Int J Biol Macromol 2022;214:312-323. PubMed
  8. Chen S, Ma Y, Li H, et al. Anti-diabetic e?ects of Inonotus obliquus extract in high fat diet combined streptozotocin-induced type 2 diabetic mice. Nutr Hosp 2022;39(6):1256-1263. PubMed
  9. Ye X, Wu K, Xu L, et al. Methanol extract of Inonotus obliquus improves type 2 diabetes mellitus through modifying intestinal flora. Front Endocrinol (Lausanne) 2023;13:1103972. PubMed

See these in context on the Chaga 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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