Black Walnut Hulls 500 mg Ingredients & Drug Interactions
by NOW
What is this page for?
First and foremost: checking Black Walnut Hulls 500 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
Black Walnut Hulls 500 mg is a dietary supplement by NOW with 1 active ingredient. Its ingredients are commonly taken for intestinal parasites and worms, digestive complaints, antimicrobial and antifungal support.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.
HelloPharmacist Scorecard of Black Walnut Hulls 500 mg by NOW
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.
What’s inside
Full disclosure
This product contains one active ingredient: black walnut hull at 500 mg per capsule. Black walnut hull is the outer covering of the black walnut fruit and has been used traditionally for various purposes.
The capsule itself is made from hypromellose (a plant-based cellulose), with magnesium stearate and silicon dioxide added as inactive ingredients to help with manufacturing and flow.
Does it work?
Couldn't assess
The evidence we hold for black walnut doesn't support a clear benefit yet. For coronary heart disease and wound healing, the research is too limited or unreliable to rate how well it works.
If you're considering this supplement for a specific health goal, talk with your pharmacist or doctor about whether the current evidence supports its use for your situation.
How safe is it?
Well-documented data
Black walnut hull is well tolerated by most adults in the short term, but human safety data are limited and long-term use hasn't been well studied. The hull contains high amounts of tannins, which can cause gastrointestinal upset when taken by mouth.
Tree nuts, including black walnuts, can trigger allergic reactions in sensitive people — tree nuts are a major food allergen in the U.S. There's also a note in the safety data about daily use of related walnut species being linked to increased tongue cancer and lip leukoplakia risk, though that refers to a different species and different parts.
If you have a tree nut allergy or a history of mouth or throat concerns, mention this supplement to your pharmacist before starting. During pregnancy, safety data aren't sufficient — best avoided until you've talked with your doctor or midwife.
While breastfeeding, the same caution applies: there isn't enough information to know if it's safe, so discuss it with your healthcare provider first.
Meds to double-check
No known interactions
No interactions are documented for black walnut in our data. Check your specific medications using the tool on this page to be sure, and let us know if anything comes up.
The bottom line
Scorecard at a glanceFully disclosed formula with no assessable stated purpose. No medication interactions are currently documented, and safety information is well characterized.
Black Walnut Hulls may appeal to you if you're exploring traditional plant remedies, but the evidence for what it actually does isn't established yet. The main concern is that the hull's tannin content can upset your stomach, and if you have a tree nut allergy, this isn't for you.
Pregnant or breastfeeding? Check with your doctor first.
Run your medications through our interaction checker, then call us if you have questions.
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 Dec 21, 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
General information
Key facts about Black Walnut Hulls 500 mg, straight from the product label.
| Brand | NOW |
|---|---|
| Barcode (UPC) | 733739046062 |
| Net contents | 100 Veg Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Dec 21, 2024 |
| DSLD ID | 313598 |
| Product type | Botanical |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Gluten Free, Dairy Free |
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 Black Walnut Hulls 500 mg by NOW, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Black Walnut | 500 mg | -- |
Other ingredients: Hypromellose, Magnesium Stearate, Silicon Dioxide
Tap any ingredient to jump to its full detail below.
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.
Suggested/Recommended/Usage/Directions
Suggested Usage: Take 1 capsule twice daily with food.
Formula
Black walnut hulls come from the immature fruit of the black walnut tree (Juglans nigra). References to the use of black walnut hulls date back to the ancient Greeks and Romans, and they have been used by many cultures throughout history as an herbal tonic. The black walnut tree is indigenous to the Middle East, but is currently grown in the U.S., Canada and Europe as well.
Juglans nigra
Triangle K (Kosher)
Precautions
Caution: For adults only.
Consult physician if pregnant/nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Contains tree nut (walnut).
Not manufactured with wheat, gluten, soy, corn, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Formulation
Natural color variation may occur in this product.
Herbal supplement
Non GMO Project Verified nongmoproject.org
Vegetarian/vegan
Made and quality tested in the USA with globally sourced ingredients.
Not manufactured with wheat, gluten, soy, corn, milk, egg, fish, shellfish, tree nut or sesame ingredients.
Storage
Store in a cool, dry place after opening.
General Statements
This bottle is made from 100% PCR (post-consumer recycled) resin.
Botanical/herbs Family owned since 1968.
Seals/Symbols
Non GMO Project Verified nongmoproject.org
Triangle K (Kosher)
GMP Quality Assured
FDA Statement of Identity
A Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Black Walnut Hulls 500 mg by NOW label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
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)The Ingredients in Black Walnut Hulls 500 mg by NOW
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Veg Capsule(s) Dosage formCapsule Servings per container100 Amounts shown are per serving.
Black Walnut
No knowninteractions
Black walnut is a tree whose green hulls are traditionally used as a natural antiparasitic and digestive remedy, but solid human evidence for these us...
Black Walnut monograph & interactionsOther (inactive) ingredients: Hypromellose, Magnesium Stearate, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.
Black Walnut Hulls 500 mg by NOW Drug Interactions
We don’t currently list any known drug interactions for the mapped ingredients in Black Walnut Hulls 500 mg. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.
Brand information
Manufacturer and brand details for Black Walnut Hulls 500 mg, from the product label.
NOW
See all NOW products- Name
- NOW FOODS
- Street Address
- 395 S. Glen Ellyn Rd.
- City
- Bloomingdale
- State
- IL
- ZipCode
- 60108
- Web Address
- nowfoods.com
Black Walnut Hulls 500 mg by NOW: Common Questions
Does Black Walnut Hulls 500 mg by NOW interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this if I have a tree nut allergy?
Will Black Walnut Hulls upset my stomach?
Is it safe to take long-term?
Does Black Walnut Hulls help with heart health?
Can I take this while pregnant or breastfeeding?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Black Walnut Hulls 500 mg is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
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.
The Full Monographs Behind Black Walnut Hulls 500 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Black Walnut Hulls 500 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.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
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 3 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.
Black Walnut 3 references
- Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
- McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
- Food and Drug Administration. Food Allergen Labeling and Consumer Protection Act of 2004 (FALCPA); Public Law 108-282, Title II. Accessed on May 19, 2021. Available at: https://www.fda.gov/food/food-allergensgluten-free-guidance-documents-regulatory-infor
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