No known drug interactions for the matched ingredients — not a guarantee none exist. Check your meds →
Dietary supplement

Black Walnut Ingredients & Drug Interactions

by Herb Pharm

Black Walnut label
See full label image
Liquid Category: Botanical
No known interaction
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Black Walnut 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 No known interaction

Black Walnut is a dietary supplement by Herb Pharm 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.

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HelloPharmacist Scorecard of Black Walnut by Herb Pharm

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 16, 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: Black Walnut Green Hull Extract from fresh, undried hulls. Black walnut hull is the outer covering of the walnut fruit — the part you might see in nature before it splits open.

This liquid extract is preserved in cane alcohol, glycerin, vinegar, and distilled water.

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 Black Walnut product and its label doesn't state a use — see Black Walnut'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 black walnut hull isn't well established. Our data shows insufficient reliable evidence to rate it for coronary heart disease or wound healing.

That means the studies we have don't give us a clear picture of whether it actually works for these purposes, so we can't make a claim either way.

The evidence, ingredient by ingredient Black Walnut

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.

Black walnut hull is generally well tolerated in the short term for most adults, but long-term safety hasn't been well studied in humans. The hull contains high amounts of tannins, which can cause stomach upset or other gastrointestinal discomfort when taken by mouth.

Tree nuts, including black walnuts, can trigger allergic reactions in sensitive people — they're a major food allergen in the US. During pregnancy, safety data are limited and it's best avoided; during breastfeeding, there isn't enough safety information, so it's also best to skip it.

If you're pregnant or nursing, talk with your doctor or pharmacist before using this product.

Side effects, ingredient by ingredient Black Walnut

Meds to double-check

No known interactions
Known Interaction Concern · database check
No known interactions

No medication interactions are currently documented for the matched ingredients — that isn't a guarantee none exist.

Why this rating?
  • None of the 1 matched ingredient has a documented medication interaction on file.

No interactions are documented in our data for the ingredients we could check. That doesn't mean none exist — it just means we haven't found evidence of them.

Talk with your doctor or pharmacist about whether this product fits safely with your medications.

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 by Herb Pharm might appeal to you if you're looking for a traditional herbal remedy, but the science backing its effectiveness isn't strong. The main caution is the tannin content, which can upset your stomach, and the potential for a tree nut allergy reaction.

If you're pregnant or breastfeeding, the safety data suggest avoiding it. Check with your doctor or pharmacist before starting, especially if you have a known nut allergy or a sensitive stomach.

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 Black Walnut, straight from the product label.

Brand Herb Pharm
Barcode (UPC) 090700000134
Net contents 1 Fluid Ounce(s); 30 mL
Market status On market
Date entered into DSLD Feb 22, 2024
DSLD ID 307449
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) 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 Black Walnut by Herb Pharm, 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:
0.7 mL
Maximum serving Sizes:
0.7 mL
Servings per container
42
UPC/BARCODE
090700000134
IngredientAmount% DV
Black Walnut Green Hull Extract, Fresh, Undried684 mg--

Other ingredients: Cane Alcohol, Glycerin, Vinegar, Water, Distilled

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.
Suggested/Recommended/Usage/Directions

Suggested Use Shake well before using Adults: Add 1 squeeze of the dropper bulb to 2 oz. of water or juice, 2 to 4 times per day. Best taken between meals.

Precautions

Caution: Not for long-term use of more than 6 weeks, followed by a 2 week break.

Keep out of the reach of children

Storage

Store away from heat & light

Formula

Juglans nigra

Black Walnut Liquid Extract

Formulation

Cleanse & detoxify

Gluten-free

FDA Statement of Identity

Herbal Supplement

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.

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

See for yourself

Black Walnut by Herb Pharm label

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

Black Walnut 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 Black Walnut by Herb Pharm

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

Serving size0.7 mL Dosage formLiquid Servings per container42 Amounts shown are per serving.

Black Walnut Green Hull Extract, Fresh, Undried

No known
interactions
684 mg per serving

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 Green Hull Extract, Fresh, Undried monograph & interactions

Other (inactive) ingredients: Cane Alcohol, Glycerin, Vinegar, Water, Distilled. These complete the product’s ingredient list but are not active constituents.

Interaction report

Black Walnut by Herb Pharm Drug Interactions

We don’t currently list any known drug interactions for the mapped ingredients in Black Walnut. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.

The maker

Brand information

Manufacturer and brand details for Black Walnut, from the product label.

Herb Pharm

See all Herb Pharm products
Name
Herb Pharm
City
Williams
State
OR
ZipCode
97544
Phone Number
800-348-4372
Web Address
www.herb-pharm.com
Pharmacist Counseling Corner

Black Walnut by Herb Pharm: Common Questions

Does Black Walnut by Herb Pharm interact with any medications?
We do not currently list a known interaction for the mapped ingredients in Black Walnut. This does not guarantee none exist, so confirm with your pharmacist.
How can one product interact with so many drugs?
Black Walnut 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 this if I'm pregnant or breastfeeding?
During pregnancy, safety data are limited and it's best avoided. While breastfeeding, there isn't enough safety information either, so it's also best to skip it. Talk with your doctor or pharmacist about your individual situation.
What side effects might I notice?
The hull contains tannins, which commonly cause stomach upset or other digestive discomfort. Tree nut allergies are possible in sensitive people — if you have a known nut allergy, don't use this product. Temporary yellowing or browning of skin is also possible if you use it topically.
How long can I safely use this?
Black walnut hull is considered acceptable short-term for most adults, but long-term use hasn't been well studied in humans. We don't have solid data on what happens if you use it daily or for months on end, so talk with your pharmacist or doctor about how long to take it.
Does black walnut actually work for heart health or wound healing?
The evidence isn't clear. Our data shows insufficient reliable evidence to rate black walnut hull for either coronary heart disease or wound healing, so we can't say whether it actually helps with these purposes.
What exactly is in this product?
This is a liquid extract of fresh black walnut hulls — the outer covering of the walnut fruit — preserved in cane alcohol, glycerin, vinegar, and distilled water. There's one active ingredient and four inactive ones.

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

Not sure if Black Walnut is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

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.

Black Walnut label
Go deeper

The Full Monographs Behind Black Walnut’s Ingredients

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

Herb & supplement monograph

Black Walnut

Black walnut is a tree whose green hulls are traditionally used as a natural antiparasitic and digestive remedy, but solid human evidence for these uses is lacking. It contains a compound ca...

Read the full Black Walnut monograph →
Sources

Sources & How We Checked

Black Walnut'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 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
  1. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  3. 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

See these in context on the Black Walnut 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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