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Dietary supplement

Black Mustard Seed Ingredients & Drug Interactions

by Terry Naturally

Black Mustard Seed 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 Black Mustard Seed 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

Black Mustard Seed is a dietary supplement by Terry Naturally with 1 active ingredient. Its ingredients are commonly taken for culinary spice, muscle and joint aches (topical plaster), chest congestion (chest rub or poultice).Based on those ingredients, 86 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Black Mustard (Brassica nigra) seed extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Black Mustard Seed by Terry Naturally

Ask about any prescription or over-the-counter medication and we check it for interactions with Black Mustard Seed by Terry Naturally — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Black Mustard Seed by Terry Naturally

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: black mustard (Brassica nigra) seed extract. The capsule itself is made up of inactive ingredients—cellulose powder, hydroxypropyl methylcellulose, rice bran extract, maltodextrin, and silica—which help form and stabilize the capsule.

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: healthy cell formation and development.
  • We looked for evidence on: cellular health, oxidative stress, inflammation.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

The evidence for black mustard seed isn't established in the data we hold. The product has been studied for common cold, osteoarthritis, and acute pain, but the current evidence is insufficient to rate whether it actually works for any of those uses.

If you're considering it for a specific reason, we'd recommend asking your pharmacist whether there's better-supported alternatives.

The evidence, ingredient by ingredient Black Mustard

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 mustard seed is generally well tolerated as a food spice in small amounts. However, concentrated seeds or medicinal amounts carry real cautions.

Very large oral doses can cause vomiting, stomach pain, and diarrhea; in extreme cases, breathing problems. Topical application of black mustard oil or powder can irritate or burn the skin, especially over time.

The safety data on medicinal or concentrated use is limited, so caution is advised if you're taking more than what you'd use in cooking. Pregnancy is a concern: the safety data rates black mustard seed as likely unsafe during pregnancy.

If you're pregnant or planning to become pregnant, avoid this product. There's no safety rating on file for breastfeeding—talk with your doctor or pharmacist for personalized advice.

Side effects, ingredient by ingredient Black Mustard

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 — Black Mustard.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 86 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.

If you take any antidiabetes drugs (medications that lower your blood sugar), you need to check with your pharmacist before starting this product—there's a documented moderate-risk interaction that could lower your blood sugar too much.

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.

Black mustard seed extract is best thought of as a traditional food spice rather than a proven supplement. If you have diabetes and take blood sugar medication, you'll want to check with your pharmacist before adding this—the interaction risk is real.

If you're pregnant, skip it. For anyone else, the main risk is taking too much and irritating your digestive tract or skin.

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 May 28, 2019.

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 Mustard Seed, straight from the product label.

Brand Terry Naturally
Barcode (UPC) 367703027469
Net contents 60 Capsule(s)
Market status On market
Date entered into DSLD May 28, 2019
DSLD ID 202341
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar 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 Mustard Seed by Terry Naturally, 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
367703027469
IngredientAmount% DV
Black Mustard (Brassica nigra) seed extract100 mg--

Other ingredients: Cellulose powder, Hydroxypropyl Methylcellulose, Rice Bran extract, Maltodextrin, Silica

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

Money-back guarantee

Concentrated Cruciferous Compounds For your good health Terry

the body converts to AITC protect your cells for a long, healthy life!

Serious support when you need it most

JC 34 91 + 3(5,6)EP BX02746.01

Formula

How Black Mustard Seed helps you fight back In order to thrive, you need optimal health at a cellular level. Black Mustard Seed provides a concentrated source of compounds you need for the ultimate in healthy cell formation and development.

Black Mustard Seed a source of Glucosinolates the most beneficial one in Sinigrin

When your defenses need serious support, Black Mustard Seed delivers. Its seeds provide sinigrin, which is one of a family of compounds from cruciferous vegetables called glucosinolates. In the body, sinigrin is converted into cell-protecting AITC (allyl-isothiocyanate), and plays a critical role in health and longevity.

While these compounds are also found in kale, brussel sprouts, and broccoli, Black Mustard Seed is a highly concentrated source, standardized for a minimum of 25% glucosinolates for optimal well being.

Suggested/Recommended/Usage/Directions

Recommendations: 1 capsule daily.

Precautions

If pregnant or nursing, consult a healthcare practitioner before using.

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

JC 34 91 + 3(5,6)EP L02746.01

FDA Statement of Identity

Dietary Supplement

Formulation

No sugar, salt, yeast, wheat, gluten, soy, dairy products, artificial coloring, artificial flavoring, or artificial preservatives.

Vegan

Non-GMO

Brand IP Statement(s)

Terry Naturally EuroPharma

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

See for yourself

Black Mustard Seed by Terry Naturally label

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

Black Mustard Seed 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 Mustard Seed by Terry Naturally

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

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

Black Mustard (Brassica nigra) seed extract

Interacts with
86 drugs
100 mg per serving Form: Glucosinolates

Black mustard is best known as a pungent culinary spice and a traditional topical remedy for muscle aches and congestion. Solid human evidence for any...

Black Mustard (Brassica nigra) seed extract monograph & interactions

Other (inactive) ingredients: Cellulose powder, Hydroxypropyl Methylcellulose, Rice Bran extract, Maltodextrin, Silica. These complete the product’s ingredient list but are not active constituents.

Interaction report

Black Mustard Seed by Terry Naturally Drug Interactions

Want to check YOUR meds against Black Mustard Seed?

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
86Drugs
86 Moderate

Ingredients driving the most interactions

Black Mustard (Brassica nigra) seed extract 86

Individual Drug Interactions

The ingredients in Black Mustard Seed interact with 86 drugs. Click any drug to see the details.

1 of the 1 ingredient in Black Mustard Seed interact with drugs. Each result below shows which ingredient is responsible. Black Mustard (Brassica nigra) seed extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Black Mustard Seed 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.

Black Mustard (Brassica nigra) seed extract1 drug type · 86 drugs

Antidiabetes Drugs

Theoretically, black mustard seed might increase the risk of hypoglycemia when used with antidiabetes drugs.
Animal research shows that some extracts of black mustard seeds can reduce blood glucose levels, possibly by regulating the release of insulin and the metabolism of glucose.

Likelihood Possible Evidence D
Black Mustard (Brassica nigra) seed extract full monograph & interactions
The maker

Brand information

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

Terry Naturally

See all Terry Naturally products
Name
EuroPharma, Inc.
City
Green Bay
State
WI
ZipCode
54311
Phone Number
(866) 807-2731
Web Address
EuroPharmaUSA.com
Pharmacist Counseling Corner

Black Mustard Seed by Terry Naturally: Common Questions

Does Black Mustard Seed by Terry Naturally interact with any medications?
Yes. Based on its ingredients, Black Mustard Seed has a known interaction with 86 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Black Mustard Seed 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 black mustard seed if I'm pregnant?
No—the safety data rates it as likely unsafe during pregnancy. If you're pregnant or planning to become pregnant, you should avoid this product.
What's the difference between using mustard as a spice and taking this supplement?
Food amounts of mustard spice are safe. This product is a concentrated seed extract, which means you're getting a much larger dose—and the safety data on that concentrated form is limited. Large amounts can upset your stomach or irritate your digestive tract.
Does black mustard seed really work for colds or arthritis?
The evidence we have isn't strong enough to say. Studies on black mustard seed for colds, arthritis pain, and acute pain all come back with insufficient evidence to rate whether it actually works.
What happens if I take too much?
Very large doses can cause vomiting, stomach pain, and diarrhea. In extreme cases, breathing problems. If you apply the oil or powder to your skin for too long, it can irritate or burn.
Is this safe to breastfeed on?
We don't have safety data on file for breastfeeding. Talk with your doctor or pharmacist—they can give you personalized advice based on your situation.

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

Not sure if Black Mustard Seed 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 Mustard Seed label
Go deeper

The Full Monographs Behind Black Mustard Seed’s Ingredients

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

Herb & supplement monograph

Black Mustard

Interacts with 86 drugs

Black mustard is best known as a pungent culinary spice and a traditional topical remedy for muscle aches and congestion. Solid human evidence for any specific health benefit is limited, and...

Read the full Black Mustard monograph →
Sources

Sources & How We Checked

Black Mustard Seed'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 8 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 Mustard 8 references
  1. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  2. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  3. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  4. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  5. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  6. Anand, P., Murali, K. Y., Tandon, V., Chandra, R., and Murthy, P. S. Preliminary studies on antihyperglycemic effect of aqueous extract of Brassica nigra (L.) Koch in streptozotocin induced diabetic rats. Indian J Exp.Biol 2007;45(8):696-701.
  7. Anand, P., Murali, Y. K., Tandon, V., Murthy, P. S., and Chandra, R. Insulinotropic effect of aqueous extract of Brassica nigra improves glucose homeostasis in streptozotocin induced diabetic rats. Exp.Clin.Endocrinol.Diabetes 2009;117(6):251-256.
  8. Gulbransen, G. and Esernio-Jenssen, D. Aspiration of black mustard. J Toxicol.Clin.Toxicol. 1998;36(6):591-593. PubMed

See these in context on the Black Mustard 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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