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

Black Walnut Leaf Ingredients & Drug Interactions

by TerraVita

Black Walnut Leaf label
See full label image
Liquid Category: Botanical
No known interaction
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Black Walnut Leaf 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 Leaf is a dietary supplement by TerraVita 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 Leaf by TerraVita

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 Leaf Glycerite Liquid Extract. Black walnut leaf is used in herbal practice for various purposes, though the evidence supporting its effectiveness is limited.

The liquid extract form is made by steeping the leaf in a glycerin base, which serves as both the extraction medium and a preservative.

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 leaf is insufficient to rate for coronary heart disease and wound healing — the two uses our data covers. That means the available research doesn't firmly support or refute its use for these purposes.

If you're considering it for a specific health concern, talk with your doctor or pharmacist about what the science actually shows and whether it's the right choice for you.

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 leaf is thought to be acceptable for short-term use in most adults, but human safety data are limited and long-term use hasn't been well studied. The leaf contains high amounts of tannins, which can irritate the stomach and 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 United States. The safety data advises against use during pregnancy and breastfeeding because there isn't enough information to know it's safe in those times.

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. Use the search tool on this page to verify your specific medications, and confirm with your doctor or pharmacist that it's right for you.

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 Leaf Glycerite may appeal to someone looking for a traditional herbal option, but the evidence for what it does is weak, and safety data — especially for long-term use — are sparse. If you're pregnant, breastfeeding, or have a tree nut allergy, the safety information suggests talking with your doctor before taking it.

Check your medications with the tool on this page, and discuss the product with your own pharmacist or doctor to make sure it fits your situation.

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 13, 2022.

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 Leaf, straight from the product label.

Brand TerraVita
Barcode (UPC) 064434280025
Net contents 1 Fluid Ounce(s); 30 mL
Market status On market
Date entered into DSLD Dec 13, 2022
DSLD ID 279341
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years)
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 Leaf by TerraVita, 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:
25 Drop(s)
Maximum serving Sizes:
40 Drop(s)
Servings per container
227
UPC/BARCODE
064434280025
IngredientAmount% DV
Black Walnut Leaf Glycerite Liquid Extract0.13 mL--

Other ingredients: Glycerin

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.
Brand IP Statement(s)

Copyright 2005 TerraVita - Distributed by ZooScape LLC, All Rights Reserved.

Formula

Glycerite liquid extract (1:5)

Formulation

Alcohol free

No flavor

Suggested/Recommended/Usage/Directions

Suggested Use: Take 25-40 drops of extract in a small amount of warm water 3-4 times daily. Shake well before using.

Precautions

Keep away from children.

Do not use if safety seal around cap is broken or missing.

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

See for yourself

Black Walnut Leaf by TerraVita label

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

Black Walnut Leaf 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 Leaf by TerraVita

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

Serving size25 Drop(s) Dosage formLiquid Servings per container227 Amounts shown are per serving.

Black Walnut Leaf Glycerite Liquid Extract

No known
interactions
0.13 mL 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 Leaf Glycerite Liquid Extract monograph & interactions

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

Interaction report

Black Walnut Leaf by TerraVita Drug Interactions

We don’t currently list any known drug interactions for the mapped ingredients in Black Walnut Leaf. 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 Leaf, from the product label.

TerraVita

See all TerraVita products
Name
ZooScape LLC
Phone Number
844-449-0444
Web Address
www.ZooScape.com
Pharmacist Counseling Corner

Black Walnut Leaf by TerraVita: Common Questions

Does Black Walnut Leaf by TerraVita interact with any medications?
We do not currently list a known interaction for the mapped ingredients in Black Walnut Leaf. This does not guarantee none exist, so confirm with your pharmacist.
How can one product interact with so many drugs?
Black Walnut Leaf 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.
Is black walnut leaf safe to take long-term?
The safety data we have is limited, and long-term use hasn't been well studied. Short-term use appears acceptable for most adults, but you should talk with your doctor or pharmacist about how long you plan to take it.
Can I take this if I'm pregnant or breastfeeding?
The safety data advises against black walnut leaf during pregnancy and breastfeeding because there isn't enough information to know it's safe. Talk with your doctor or pharmacist for personalized advice if you're pregnant, planning to become pregnant, or breastfeeding.
What side effects might I notice?
The most common side effect is gastrointestinal upset — stomach irritation or other digestive trouble — because the leaf contains high amounts of tannins. If you have a tree nut allergy, this product could trigger an allergic reaction, since black walnuts are classified as a major food allergen.
Does this product actually work for heart health or wound healing?
The evidence for black walnut leaf isn't strong enough to say. For both coronary heart disease and wound healing, we have insufficient reliable evidence to rate whether it works. Your doctor can help you weigh whether to try it and what the current research actually supports.
What's in this besides black walnut leaf?
The liquid extract is made using glycerin as the extraction base. Glycerin is an inactive ingredient that helps preserve and dissolve the black walnut leaf extract.

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

Not sure if Black Walnut Leaf 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 Leaf label
Go deeper

The Full Monographs Behind Black Walnut Leaf’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 Leaf'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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