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Dietary supplement

Vitamin K-Max Ingredients & Drug Interactions

by Maxi Health

Vitamin K-Max label
See full label image
Capsule Category: Botanical With Nutrients
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Vitamin K-Max 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: Major

Vitamin K-Max is a dietary supplement by Maxi Health with 2 active ingredients. Its ingredients are commonly taken for high cholesterol, heart health support, blood sugar support.Based on those ingredients, 3 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are VitaMK-7, Barley Grass, Powder. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Vitamin K-Max by Maxi Health

Ask about any prescription or over-the-counter medication and we check it for interactions with Vitamin K-Max by Maxi Health — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Vitamin K-Max by Maxi Health

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 2 of its 2 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Vitamin K-Max contains two active ingredients: Barley Grass Powder and VitaMK-7 (a form of vitamin K). Barley Grass is the whole plant in powder form; VitaMK-7 is a bioavailable type of vitamin K, also called menaquinone-7.

The product also contains several inactive ingredients — microcrystalline cellulose, cellulose, magnesium stearate, calcium carbonate, bromelain, papain, lipase, amylase, protease, and silica — which serve as binders, fillers, and digestive enzymes.

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
Strong

Clinical evidence supports at least one of this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Supporting normal blood clotting and bone health.
  • We looked for evidence on: Hemorrhagic disease, Hypoprothrombinemia, Vitamin K-dependent clotting factors deficiency (VKCFD), Warfarin anticoagulation, Osteoporosis, Bone mineralization — and 2 related terms.
  • The strongest evidence on file: Vitamin K is rated "Effective" for Hemorrhagic disease (Natural Medicines).
  • Also on file: Vitamin K is rated "Effective" for Hypoprothrombinemia, Warfarin anticoagulation, Vitamin K-dependent clotting factors deficiency (VKCFD).
  • Also on file: Vitamin K is rated "Possibly Effective" for Osteoporosis.

For barley grass, the evidence shows it's likely effective for high cholesterol (hypercholesterolemia) and coronary heart disease. For the vitamin K component, the data shows it's effective for correcting vitamin K deficiency and its complications — low clotting factors (hypoprothrombinemia), vitamin K-dependent clotting factor deficiency, and hemorrhagic disease.

Vitamin K is also possibly effective for osteoporosis, though the evidence is not as strong.

The evidence, ingredient by ingredient Barley Vitamin K

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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Barley grass is generally well tolerated when eaten as food, but it contains gluten, so it's not suitable if you have celiac disease or gluten sensitivity. Concentrated barley supplements haven't been well studied in pregnancy or while breastfeeding — there isn't enough data to know whether it's safe, so check with your doctor or pharmacist for personalized advice.

Vitamin K is generally safe in food amounts and most supplements for healthy people, though your doctor should give the okay before you take supplements if you're on any medications. Common side effects from barley grass include bloating, gas, and an unpleasant taste.

Allergic reactions are possible in sensitive people. Vitamin K commonly causes mild stomach upset, nausea, and diarrhea.

Severe allergic reactions are very rare but have been reported with intravenous vitamin K.

Side effects, ingredient by ingredient Barley Vitamin K

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 2 of the 2 matched ingredients can interact with medications — Barley, Vitamin K.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 3 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 warfarin (Coumadin) or any blood thinner (anticoagulant), double-check with your pharmacist before starting — vitamin K in this product can reduce its effectiveness and you may need dose adjustments. If you take triclabendazole (Egaten) for parasites, mention this product to your doctor as well.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.

Vitamin K-Max may be worth considering if you're looking to support cholesterol levels or bone health and don't have a gluten sensitivity. If you take warfarin or any blood thinner, or if you're on triclabendazole, check with your pharmacist before you start — this product could interfere.

Talk to your pharmacist about whether it fits your health plan.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jan 23, 2025.

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 Vitamin K-Max, straight from the product label.

Brand Maxi Health
Barcode (UPC) 753406271122
Net contents 120 Maxicap(s)
Market status On market
Date entered into DSLD Jan 23, 2025
DSLD ID 323816
Product type Botanical With Nutrients
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Gluten Free, Dairy 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 Vitamin K-Max by Maxi Health, 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
120
UPC/BARCODE
753406271122
IngredientAmount% DV
Barley Grass, Powder100 mg--
VitaMK-7100 mcg--

Other ingredients: Microcrystalline Cellulose, Cellulose, Magnesium Stearate, Calcium Carbonate, Bromelain, Papain, Lipase, Amylase, Protease, 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.
Suggested/Recommended/Usage/Directions

Directions: Take one (1) Maxicap once or twice daily, or as directed.

Storage

Keep tightly closed in a cool, dry place.

Precautions

Keep out of reach of children.

Do not use this product with Coumadin (Warfarin) blood thinning medications unless under the care of your healthcare practitioner.

Contains soy.

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.

Formulation

Vegetarian

Bone & joint

This product contains no animal products, wheat, salt, yeast, gluten, milk, artificial flavors, colorings or preservatives.

This product was manufactured in a GMP Certified facility.

Cardiovascular health

Formula

Certified Kosher UK (Rav Shmuel Dovid Krausz (Udvarer Rav)) (Kosher) BDZ Edah Charedis - Orthodox Council of Jerusalem (Kosher) OU (Kosher)

VitamK7 Natural Vitamin K2 as MK7

Enzymax Base

General Statements

Doctor Formulated

Support at arm's length

Seals/Symbols

UK (Rav Shmuel Dovid Krausz (Udvarer Rav)) (Kosher) BDZ Edah Charedis - Orthodox Council of Jerusalem (Kosher)

OU (Kosher)

Manufactured in a Certified GMP facility

FDA Statement of Identity

Dietary Supplement

Brand IP Statement(s)

MaxiHealth True to total wellness

Enzymax, a vital digestive enzyme complex, is a registered trademark of Maxi Health Research LLC. VitaMK7 is a registered trademark of Gnosis S.p.A.

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

See for yourself

Vitamin K-Max by Maxi Health label

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

Vitamin K-Max 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 Vitamin K-Max by Maxi Health

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container120 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Barley Grass, Powder

Interacts with
1 drug
100 mg 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 Grass, Powder monograph & interactions

VitaMK-7

Interacts with
2 drugs
100 mcg per serving Form: Menaquinone-7

Vitamin K is an essential nutrient your body needs for normal blood clotting and to support healthy bones. Most people get enough from food, but suppl...

VitaMK-7 monograph & interactions

Other (inactive) ingredients: Microcrystalline Cellulose, Cellulose, Magnesium Stearate, Calcium Carbonate, Bromelain, Papain, Lipase, Amylase, Protease, Silica. These complete the product’s ingredient list but are not active constituents.

Interaction report

Vitamin K-Max by Maxi Health Drug Interactions

Want to check YOUR meds against Vitamin K-Max?

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
3Drugs
2 Major 1 Moderate

Ingredients driving the most interactions

VitaMK-7 2
Barley Grass, Powder 1

Individual Drug Interactions

The ingredients in Vitamin K-Max interact with 3 drugs. Click any drug to see the details.

2 of the 2 ingredients in Vitamin K-Max interact with drugs. Each result below shows which ingredient is responsible. VitaMK-7 Barley Grass, Powder

Each ingredient & the kinds of drugs it affects

For each ingredient in Vitamin K-Max with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

VitaMK-71 drug type · 2 drugs

Warfarin (Coumadin)

Vitamin K can antagonize and reverse the therapeutic effects of warfarin.
Vitamin K antagonizes the effects of warfarin. Excessive vitamin K intake, either from supplements or from changes in the diet, can reduce the anticoagulant effect of warfarin.

Likelihood Likely Evidence C
VitaMK-7 full monograph & interactions

Barley Grass, Powder1 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 Grass, Powder full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Vitamin K-Max, from the product label.

Maxi Health

See all Maxi Health products
Name
Maxi Health
City
Brooklyn
State
N.Y.
Phone Number
800-544-6294
Web Address
www.maxihealth.com
Pharmacist Counseling Corner

Vitamin K-Max by Maxi Health: Common Questions

Does Vitamin K-Max by Maxi Health interact with any medications?
Yes. Based on its ingredients, Vitamin K-Max has a known interaction with 3 medications, including 2 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Vitamin K-Max contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is 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, so this product isn't appropriate if you have celiac disease or gluten sensitivity.
Is it safe to take this while I'm pregnant or breastfeeding?
There isn't enough safety data on concentrated barley supplements during pregnancy or breastfeeding to say either way. Talk with your doctor or pharmacist for advice tailored to your situation.
What side effects might I notice?
The most common ones are mild — bloating, gas, nausea, stomach upset, or diarrhea. Allergic reactions are possible in sensitive people but aren't common.
What is VitaMK-7 and why is it in this product?
VitaMK-7 is a bioavailable form of vitamin K that your body can use to make clotting factors and may support bone health. It's the active vitamin K component in this supplement.
Will this help my cholesterol or bones?
Barley grass is likely effective for high cholesterol and heart disease. Vitamin K is possibly effective for bone health (osteoporosis), meaning the evidence is less strong for that use.

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

Not sure if Vitamin K-Max 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.

Vitamin K-Max label
Go deeper

The Full Monographs Behind Vitamin K-Max’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 → Herb & supplement monograph

Vitamin K

Interacts with 2 drugs

Vitamin K is an essential nutrient your body needs for normal blood clotting and to support healthy bones. Most people get enough from food, but supplements are sometimes used for deficiency...

Read the full Vitamin K monograph →
Sources

Sources & How We Checked

Vitamin K-Max'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 26 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 →

Vitamin K 11 references
  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
  2. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
  3. Crowther MA, Ageno W, Garcia D, et al. Oral vitamin K versus placebo to correct excessive anticoagulation in patients receiving warfarin: a randomized trial. Ann Intern Med. 2009;150(5):293-300. PubMed
  4. Dietary vitamin K guidance: an effective strategy for stable control of oral anticoagulation? Nutr Rev. 2010;68(3):178-81. PubMed
  5. Kim JS, Nafziger AN, Gaedigk A, et al. Effects of oral vitamin K on S- and R-warfarin pharmacokinetics and pharmacodynamics: enhanced safety of warfarin as a CYP2C9 probe. J Clin Pharmacol. 2001 Jul;41(7):715-22. PubMed
  6. Riegert-Johnson, D. L. and Volcheck, G. W. The incidence of anaphylaxis following intravenous phytonadione (vitamin K1): a 5-year retrospective review. Ann.Allergy Asthma Immunol. 2002;89(4):400-406. PubMed
  7. Dezee, K. J., Shimeall, W. T., Douglas, K. M., Shumway, N. M., and O'malley, P. G. Treatment of excessive anticoagulation with phytonadione (vitamin K): a meta-analysis. Arch.Intern.Med. 2-27-2006;166(4):391-397. DOI
  8. Dentali, F., Ageno, W., and Crowther, M. Treatment of coumarin-associated coagulopathy: a systematic review and proposed treatment algorithms. J.Thromb.Haemost. 2006;4(9):1853-1863. PubMed
  9. Caluwé R, Vandecasteele S, Van Vlem B, Vermeer C, De Vriese AS. Vitamin K2 supplementation in haemodialysis patients: a randomized dose-finding study. Nephrol Dial Transplant. 2014;29(7):1385-90.
  10. Huang ZB, Wan SL, Lu YJ, Ning L, Liu C, Fan SW. Does vitamin K2 play a role in the prevention and treatment of osteoporosis for postmenopausal women: a meta-analysis of randomized controlled trials. Osteoporos Int. 2015;26(3):1175-86. PubMed
  11. Hunnali CR, Devi U, Kitchanan S, Sethuraman G. Three Different Regimens for Vitamin K Birth Prophylaxis in Infants Born Preterm: A Randomized Clinical Trial. J Pediatr 2023;255:98-104. PubMed

See these in context on the Vitamin K 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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