Major interaction on record — check this product against your medications before combining. Check your meds →
Dietary supplement

K2-7 Ingredients & Drug Interactions

by Vital Nutrients

K2-7 label
See full label image
Capsule Category: Vitamin
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking K2-7 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

K2-7 is a dietary supplement by Vital Nutrients with 1 active ingredient. Its ingredients are commonly taken for supporting normal blood clotting, bone health, heart and vascular health.Based on those ingredients, 2 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Vitamin K2-7. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against K2-7 by Vital Nutrients

Ask about any prescription or over-the-counter medication and we check it for interactions with K2-7 by Vital Nutrients — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of K2-7 by Vital Nutrients

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.
  • “Vitamin K2-7” is listed as a grouped ingredient — the label gives one combined amount (180 mcg) without saying how much of each component you get.

K2-7 is a single-ingredient supplement: menaquinone-7, which is a form of vitamin K2. Vitamin K is a fat-soluble vitamin your body uses to activate proteins involved in blood clotting and bone health.

The product also contains inactive ingredients — cellulose, ascorbyl palmitate, and leucine — which are fillers and binders.

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: Vitamin K for blood clotting and bone health.
  • We looked for evidence on: Hemorrhagic disease, Hypoprothrombinemia, Intraventricular hemorrhage, Vitamin K-dependent clotting factors deficiency (VKCFD), Warfarin anticoagulation, Osteoporosis — and 3 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.

Menaquinone-7 is Effective for treating vitamin K deficiency conditions: hypoprothrombinemia (a blood-clotting disorder), vitamin K-dependent clotting factor deficiency, warfarin anticoagulation management, and hemorrhagic disease. It is Possibly Effective for osteoporosis.

The evidence for bone health is not as strong as for clotting disorders.

The evidence, ingredient by ingredient 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 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.

Vitamin K taken by mouth is generally well tolerated in healthy people at normal dietary amounts. The most common side effects are mild: nausea, diarrhea, stomach upset, and abdominal pain — a small number of trial participants experienced these.

Intravenous forms (not this product) can rarely cause severe allergic reactions, but that's not a concern with oral supplements. Vitamin K is rated Likely Safe in pregnancy and lactation.

Side effects, ingredient by ingredient 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?
  • 1 of the 1 matched ingredient can interact with medications — Vitamin K.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 2 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, do not start this product without checking with your pharmacist or doctor first. Vitamin K directly interferes with blood-thinning medications, and consistency matters — you can't change your intake without risking your clotting control.

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.

K2-7 is straightforward if you're not on warfarin or other blood thinners — it's a simple, well-tolerated source of vitamin K2. If you are on a blood thinner, you must check with your doctor or pharmacist before starting it, because vitamin K can interfere with how those drugs work.

Most people tolerate it well, but nausea or mild stomach upset can happen.

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 Jan 24, 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 K2-7, straight from the product label.

Brand Vital Nutrients
Barcode (UPC) 693465548110
Net contents 60 Vegetarian Capsule(s)
Market status On market
Date entered into DSLD Jan 24, 2024
DSLD ID 305059
Product type Vitamin
Supplement form Capsule
Dietary claims / uses All Other
Intended target group(s) 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 K2-7 by Vital Nutrients, 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 Vegetarian Capsule(s)
Maximum serving Sizes:
1 Vegetarian Capsule(s)
Servings per container
60
UPC/BARCODE
693465548110
IngredientAmount% DV
Menaquinone-71900 mcg--
Vitamin K2-7180 mcg150%

Other ingredients: Cellulose, Ascorbyl Palmitate, Leucine

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.
Storage

Store sealed in a cool dry place

Precautions

Keep out of reach of children

Use only if safety seal is intact

Warning If you take Coumadin (warfarin) or other prescription blood thinners or are pregnant, consult your physician before taking.

Suggested/Recommended/Usage/Directions

Recommendations 1 capsule daily ideally with food to increase absorption, or as directed by your healthcare professional.

Formulation

Excludes coatings, binders, gluten (wheat, rye, barley) milk/dairy (casein. whey), soy protein, egg protein, sugar. Verified by independent testing

Raw materials and finished products are independently tested by U.S. labs. Learn more at vitalnutrients.net

FDA Statement of Identity

Dietary Supplement

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

See for yourself

K2-7 by Vital Nutrients label

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

K2-7 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 K2-7 by Vital Nutrients

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

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

Vitamin K2-7

Interacts with
2 drugs
180 mcg per serving

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...

Vitamin K2-7 monograph & interactions

Other (inactive) ingredients: Cellulose, Ascorbyl Palmitate, Leucine. These complete the product’s ingredient list but are not active constituents.

Interaction report

K2-7 by Vital Nutrients Drug Interactions

Want to check YOUR meds against K2-7?

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
2Drugs
2 Major

Ingredients driving the most interactions

Vitamin K2-7 2

Individual Drug Interactions

The ingredients in K2-7 interact with 2 drugs. Click any drug to see the details.

1 of the 1 ingredient in K2-7 interact with drugs. Each result below shows which ingredient is responsible. Vitamin K2-7

Each ingredient & the kinds of drugs it affects

For each ingredient in K2-7 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.

Vitamin K2-71 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
Vitamin K2-7 full monograph & interactions
The maker

Brand information

Manufacturer and brand details for K2-7, from the product label.

Vital Nutrients

See all Vital Nutrients products
Name
Vital Nutrients
Street Address
45 Kenneth Dooley Drive
City
Middleton
State
CT
ZipCode
06457
Web Address
vitalnutrients.net
Pharmacist Counseling Corner

K2-7 by Vital Nutrients: Common Questions

Does K2-7 by Vital Nutrients interact with any medications?
Yes. Based on its ingredients, K2-7 has a known interaction with 2 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?
K2-7 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.
What is menaquinone-7 and why is it in this supplement?
Menaquinone-7 is a form of vitamin K2. Your body uses vitamin K to activate proteins that help your blood clot and may support bone health. This supplement delivers that nutrient in a dose form beyond what food alone typically provides.
Can I take this if I'm on warfarin or another blood thinner?
Not without talking to your doctor or pharmacist first. Vitamin K can reduce how well blood thinners work, which is a Major interaction. Your provider needs to know before you start, and you'll need to keep your vitamin K intake steady if you do take it.
What side effects might I notice?
Orally, vitamin K is generally well tolerated. The most common side effects are mild — nausea, diarrhea, stomach upset, and abdominal pain — and not everyone experiences them. Serious side effects from this form are very rare.
Is this safe during pregnancy or breastfeeding?
Yes — vitamin K is rated Likely Safe in pregnancy and lactation. Still, talk with your doctor or midwife about whether you need a supplement, since you're getting vitamin K from food.
Does this supplement really work for bone health?
The evidence suggests it's Possibly Effective for osteoporosis, but it's not as well proven as it is for blood-clotting disorders. Bone health typically requires a full picture — calcium, vitamin D, exercise, and overall diet matter too.

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

Not sure if K2-7 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.

K2-7 label
Go deeper

The Full Monographs Behind K2-7’s Ingredients

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

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

K2-7'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 11 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.

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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