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Dietary supplement

Barley Grass 500 mg Ingredients & Drug Interactions

by Swanson GreenFoods Formulas

Barley Grass 500 mg label
See full label image
Tablet Or Pill 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 Barley Grass 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

The interaction bottom line Most serious interaction: Moderate

Barley Grass 500 mg is a dietary supplement by Swanson GreenFoods Formulas with 1 active ingredient. Its ingredients are commonly taken for high cholesterol, heart health support, blood sugar support.Based on those ingredients, 1 medication has a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Barley. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Barley Grass 500 mg by Swanson GreenFoods Formulas

Ask about any prescription or over-the-counter medication and we check it for interactions with Barley Grass 500 mg by Swanson GreenFoods Formulas — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Barley Grass 500 mg by Swanson GreenFoods Formulas

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 12, 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: barley grass at 500 mg per tablet. Barley is a cereal grain that's been used in traditional and modern nutrition; the grass form is a concentrated extraction of the young plant.

The tablet also includes inactive ingredients — stearic acid, calcium palmitate, croscarmellose sodium, and chlorophyll — that help bind and preserve the formula.

Does it work?

Strong evidence
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

This product doesn't appear to be marketed for a specific use, so we graded Barley's overall clinical evidence instead.

Strong

Strong clinical evidence supports Barley for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Coronary heart disease (CHD) — rated "Likely Effective" (Natural Medicines).
  • On file: Hypercholesterolemia — rated "Likely Effective" (Natural Medicines).

The evidence supporting barley for lowering cholesterol and supporting heart health is solid. Barley is rated likely effective for both hypercholesterolemia (high cholesterol) and coronary heart disease.

If you're taking it for either of those purposes, the research backs the use.

The evidence, ingredient by ingredient Barley

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.

Barley as a food is generally well tolerated and considered safe. The most common side effects are mild and digestive: bloating, flatulence, abdominal distension, and sometimes an unpleasant taste.

Allergic reactions can occur in sensitive people — symptoms may range from tingling in the lips and face to more serious reactions like chest tightness, difficulty breathing, or rarely, anaphylaxis. Because barley contains gluten, it's not suitable if you have celiac disease or gluten sensitivity.

Pregnancy and breastfeeding safety data for concentrated barley supplements is limited — the grain itself as food is fine, but concentrated forms haven't been well studied. Talk with your doctor or pharmacist for personalized advice if you're pregnant or nursing.

Side effects, ingredient by ingredient Barley

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 — Barley.
  • The most serious interaction on file is rated Moderate.
  • For scale: 1 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 triclabendazole (Egaten) for a parasitic infection, tell your pharmacist before using this product — barley may reduce how well it works. No other medication interactions are documented in our data for the ingredients we could check.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

Barley grass may help with cholesterol and heart health if that's your goal. If you're taking triclabendazole or any other medications, check them first — and be aware of the gluten content and the small risk of allergic reactions in sensitive people.

Ask your pharmacist before starting if you're pregnant, nursing, or have any food allergies.

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 Jun 25, 2018.

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 Barley Grass 500 mg, straight from the product label.

Brand Swanson GreenFoods Formulas
Barcode (UPC) 087614060033
Net contents 240 Tablet(s)
Market status On market
Date entered into DSLD Jun 25, 2018
DSLD ID 177525
Product type Botanical
Supplement form Tablet Or Pill
Dietary claims / uses All Other
Intended target group(s) Vegetarian, 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 Barley Grass 500 mg by Swanson GreenFoods Formulas, 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 Tablet(s)
Maximum serving Sizes:
2 Tablet(s)
Servings per container
120
UPC/BARCODE
087614060033
IngredientAmount% DV
Barley1 Gram(s)--

Other ingredients: Stearic Acid, Calcium Palmitate, Croscarmellose Sodium, Chlorophyll

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

Phytonutrient-rich green foods

The original "green food"

To reorder, call toll free 1-800-437-4148 or visit our website at www.swansonvitamins.com

FDA Statement of Identity

Herbal Supplement

Formulation

V Vegetarian Formula

Seals/Symbols

V Vegetarian Formula

Guaranteed purity & potency

Precautions

Do not use if seal is broken.

Keep out of reach of children.

Storage

Store in a cool, dry place.

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take two tablets per day with water.

General

SWR003 Rev 0 07 20 17

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

See for yourself

Barley Grass 500 mg by Swanson GreenFoods Formulas label

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

Barley Grass 500 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 Barley Grass 500 mg by Swanson GreenFoods Formulas

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

Serving size2 Tablet(s) Dosage formTablet Or Pill Servings per container120 Amounts shown are per serving.

Barley

Interacts with
1 drug
1 Gram(s) per serving

Barley is a nutritious whole grain that is a good source of soluble fiber called beta-glucan, which has solid evidence for modestly lowering LDL ('bad...

Barley monograph & interactions

Other (inactive) ingredients: Stearic Acid, Calcium Palmitate, Croscarmellose Sodium, Chlorophyll. These complete the product’s ingredient list but are not active constituents.

Interaction report

Barley Grass 500 mg by Swanson GreenFoods Formulas Drug Interactions

Want to check YOUR meds against Barley Grass 500 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
1Drugs
1 Moderate

Ingredients driving the most interactions

Barley 1

Individual Drug Interactions

The ingredients in Barley Grass 500 mg interact with 1 drug. Click any drug to see the details.

1 of the 1 ingredient in Barley Grass 500 mg interact with drugs. Each result below shows which ingredient is responsible. Barley

Each ingredient & the kinds of drugs it affects

For each ingredient in Barley Grass 500 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.

Barley1 drug type · 1 drug

Triclabendazole (Egaten)

Theoretically, barley might decrease the clinical effects of triclabendazole.
Animal research suggests that a diet supplemented with barley can reduce the bioavailability of triclabendazole when taken concomitantly. This effect has not been shown in humans.

Likelihood Possible Evidence D
Barley full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Barley Grass 500 mg, from the product label.

Swanson GreenFoods Formulas

See all Swanson GreenFoods Formulas products
Name
Swanson Health Products
City
Fargo
State
ND
ZipCode
58104
Phone Number
1-800-437-4148
Web Address
www.swansonvitamins.com
Pharmacist Counseling Corner

Barley Grass 500 mg by Swanson GreenFoods Formulas: Common Questions

Does Barley Grass 500 mg by Swanson GreenFoods Formulas interact with any medications?
Yes. Based on its ingredients, Barley Grass 500 mg has a known interaction with 1 medication. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Barley Grass 500 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.
Does barley grass have gluten?
Yes, barley contains gluten. If you have celiac disease or gluten sensitivity, this product isn't for you.
Is it safe to take while I'm pregnant?
The safety data on concentrated barley supplements in pregnancy is limited — there isn't enough information to know either way. Barley as a regular food is fine, but talk with your doctor or pharmacist before taking a supplement like this while pregnant.
What are the most common side effects?
Barley is generally well tolerated. The most frequent side effects are mild and digestive — bloating, flatulence, abdominal distension, and sometimes an unpleasant taste. Allergic reactions can happen in sensitive people.
Does this really help with cholesterol?
Yes — barley is rated likely effective for lowering cholesterol and supporting coronary heart health. The research backs its use for those purposes.
What if I have a barley or cereal allergy?
If you're allergic to barley or other cereals, avoid this product. Allergic reactions to barley can range from mild (tingling lips, itching) to severe (difficulty breathing, anaphylaxis), and cross-allergenicity exists between different grains.

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

Not sure if Barley Grass 500 mg is safe with your meds?

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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.

Barley Grass 500 mg label
Go deeper

The Full Monographs Behind Barley Grass 500 mg’s Ingredients

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

Herb & supplement monograph

Barley

Interacts with 1 drug

Barley is a nutritious whole grain that is a good source of soluble fiber called beta-glucan, which has solid evidence for modestly lowering LDL ('bad') cholesterol when eaten regularly. It...

Read the full Barley monograph →
Sources

Sources & How We Checked

Barley Grass 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.

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 15 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.

Barley 15 references
  1. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  2. Fernandez-Anaya S, Crespo JF, Rodriguez JR, et al. Beer anaphylaxis. J Allergy Clin Immunol 1999;103:959-60.
  3. Lembo A, Camilleri M. Chronic constipation. N Engl J Med 2003;349:1360-8. . PubMed
  4. Ferre, I., Giraldez, F. J., Alvarez-Bujidos, M. L., and Mantecon, A. R. Influence of barley supplement on plasma concentration of triclabendazole metabolites in sheep. Vet.Rec. 11-22-1997;141(21):549-551. PubMed
  5. Curioni, A., Santucci, B., Cristaudo, A., Canistraci, C., Pietravalle, M., Simonato, B., and Giannattasio, M. Urticaria from beer: an immediate hypersensitivity reaction due to a 10- kDa protein derived from barley. Clin Exp Allergy 1999;29(3):407-413. PubMed
  6. Fernandez-Anaya, S., Crespo, J. F., Rodriguez, J. R., Daroca, P., Carmona, E., Herraez, L., and Lopez-Rubio, A. Beer anaphylaxis. J Allergy Clin Immunol. 1999;103(5 Pt 1):959-960.
  7. Cronin, E. Contact dermatitis from barley dust. Contact Dermatitis 1979;5(3):196. PubMed
  8. Block, G., Tse, K. S., Kijek, K., Chan, H., and Chan-Yeung, M. Baker's asthma. Studies of the cross-antigenicity between different cereal grains. Clin Allergy 1984;14(2):177-185.
  9. van Ketel, W. G. Immediate type allergy to malt in beer. Contact Dermatitis 1980;6(4):297-298. PubMed
  10. Ellis, H. J., Doyle, A. P., Day, P., Wieser, H., and Ciclitira, P. J. Demonstration of the presence of coeliac-activating gliadin-like epitopes in malted barley. Int Arch Allergy Immunol. 1994;104(3):308-310. PubMed
  11. Vidal, C. and Gonzalez-Quintela, A. Food-induced and occupational asthma due to barley flour. Ann Allergy Asthma Immunol. 1995;75(2):121-124.
  12. Gutgesell, C. and Fuchs, T. Contact urticaria from beer. Contact Dermatitis 1995;33(6):436-437. PubMed
  13. Baker, P. G. and Read, A. E. Oats and barley toxicity in coeliac patients. Postgrad.Med J 1976;52(607):264-268. PubMed
  14. Nakase, M., Usui, Y., Alvarez-Nakase, A. M., Adachi, T., Urisu, A., Nakamura, R., Aoki, N., Kitajima, K., and Matsuda, T. Cereal allergens: rice-seed allergens with structural similarity to wheat and barley allergens. Allergy 1998;53(46 Suppl):55-57. PubMed
  15. Pereira, F., Rafael, M., and Lacerda, M. H. Contact dermatitis from barley. Contact Dermatitis 1998;39(5):261-262. PubMed

See these in context on the Barley 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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