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Dietary supplement

Real Food K-2 200 mcg Maximum Strength Ingredients & Drug Interactions

by Swanson

Real Food K-2 200 mcg Maximum Strength label
See full label image
Softgel Capsule Category: Vitamin
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 Real Food K-2 200 mcg Maximum Strength 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

Real Food K-2 200 mcg Maximum Strength is a dietary supplement by Swanson 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 K-2. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Real Food K-2 200 mcg Maximum Strength by Swanson

Ask about any prescription or over-the-counter medication and we check it for interactions with Real Food K-2 200 mcg Maximum Strength by Swanson — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Real Food K-2 200 mcg Maximum Strength by Swanson

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: vitamin K-2 at 200 mcg per softgel capsule. The softgel also contains several inactive ingredients — sunflower oil, gelatin, glycerin, beeswax, dibasic calcium phosphate, purified water, sunflower lecithin, and caramel color — that make up the capsule structure and base.

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: Support 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.

Vitamin K-2 is rated effective for treating vitamin K deficiency states, including hypoprothrombinemia (a clotting disorder), vitamin K-dependent clotting factor deficiency, and hemorrhagic disease (bleeding disorders). It's also rated possibly effective for osteoporosis.

The evidence for bone health is not as established as for clotting disorders, so results vary.

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.

Orally taken vitamin K is generally well tolerated in healthy people at normal dietary amounts. When taken as a supplement, the most common side effects are mild — nausea, stomach upset, abdominal pain, and diarrhea.

The safety data notes that normal dietary amounts are fine, but you should check with your doctor before starting a supplement. Vitamin K-2 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 another blood thinner (anticoagulant), double-check with your doctor or pharmacist before using this product — vitamin K-2 is a major interaction that can reduce how well your blood thinner works.

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.

This supplement is useful if you have a vitamin K deficiency or your doctor recommends it for bone health. If you take warfarin or any blood thinner, you must talk to your doctor or pharmacist before starting it — this product can undo your medication's protective effect.

For anyone else in good health, ask your pharmacist before adding it to make sure it fits your routine.

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 24, 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 Real Food K-2 200 mcg Maximum Strength, straight from the product label.

Brand Swanson
Barcode (UPC) 087614029061
Net contents 30 Softgel(s)
Market status On market
Date entered into DSLD Jun 24, 2019
DSLD ID 204282
Product type Vitamin
Supplement form Softgel Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
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 Real Food K-2 200 mcg Maximum Strength by Swanson, 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 Softgel(s)
Maximum serving Sizes:
1 Softgel(s)
UPC/BARCODE
087614029061
IngredientAmount% DV
Vitamin K-2200 mcg167%

Other ingredients: Sunflower Oil, Gelatin, Glycerin, Beeswax, Dibasic Calcium Phosphate, purified Water, Sunflower Lecithin, Caramel color

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

Suggested use: As a dietary supplement, take one softgel per day with water.

Precautions

Warning: For adults only.

Consult your physician before using this or any product if you are pregnant or nursing, taking medication, especially blood-thinning medications, or have a medical condition.

Keep out of reach of children.

Do not use if seal is broken.

Contains soy and sulfites.

Storage

Store in a cool, dry place. Do not refrigerate.

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.

Formula

Natural Vitamin K-2 200 mcg per softgel

Contains soy and sulfites.

General Statements

Bone and cardiovascular health

FDA Statement of Identity

Vitamin Supplement

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

See for yourself

Real Food K-2 200 mcg Maximum Strength by Swanson label

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

Real Food K-2 200 mcg Maximum Strength 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 Real Food K-2 200 mcg Maximum Strength by Swanson

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

Serving size1 Softgel(s) Dosage formSoftgel Capsule Amounts shown are per serving.

Vitamin K-2

Interacts with
2 drugs
200 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...

Vitamin K-2 monograph & interactions

Other (inactive) ingredients: Sunflower Oil, Gelatin, Glycerin, Beeswax, Dibasic Calcium Phosphate, Purified Water, Sunflower Lecithin, Caramel color. These complete the product’s ingredient list but are not active constituents.

Interaction report

Real Food K-2 200 mcg Maximum Strength by Swanson Drug Interactions

Want to check YOUR meds against Real Food K-2 200 mcg Maximum Strength?

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 K-2 2

Individual Drug Interactions

The ingredients in Real Food K-2 200 mcg Maximum Strength interact with 2 drugs. Click any drug to see the details.

1 of the 1 ingredient in Real Food K-2 200 mcg Maximum Strength interact with drugs. Each result below shows which ingredient is responsible. Vitamin K-2

Each ingredient & the kinds of drugs it affects

For each ingredient in Real Food K-2 200 mcg Maximum Strength 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 K-21 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 K-2 full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Real Food K-2 200 mcg Maximum Strength, from the product label.

Swanson

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

Real Food K-2 200 mcg Maximum Strength by Swanson: Common Questions

Does Real Food K-2 200 mcg Maximum Strength by Swanson interact with any medications?
Yes. Based on its ingredients, Real Food K-2 200 mcg Maximum Strength 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?
Real Food K-2 200 mcg Maximum Strength 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 this if I'm pregnant or breastfeeding?
Vitamin K-2 is rated likely safe during pregnancy and lactation. That said, any supplement in pregnancy or breastfeeding is a conversation worth having with your doctor or midwife — they know your full picture.
What are the most common side effects?
Taken by mouth, vitamin K is generally well tolerated. The most common mild side effects are nausea, stomach upset, abdominal pain, and diarrhea. These are not serious, but if they bother you, mention it to your pharmacist.
Will this really help my bones?
Vitamin K-2 is rated possibly effective for osteoporosis, which means the evidence suggests it may help but isn't definitive yet. It's worth discussing with your doctor as part of a bone-health plan, but don't expect it to be a standalone cure.
What's the difference between the softgel capsule form and other forms of K-2?
The product facts only cover this softgel — we don't have data on other forms to compare. Your pharmacist can talk through which form might work best for you.
How much vitamin K-2 is in each capsule?
Each softgel contains 200 mcg of vitamin K-2, which is why it's labeled maximum strength.

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

Not sure if Real Food K-2 200 mcg Maximum Strength is safe with your meds?

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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.

Real Food K-2 200 mcg Maximum Strength label
Go deeper

The Full Monographs Behind Real Food K-2 200 mcg Maximum Strength’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

Real Food K-2 200 mcg Maximum Strength'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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