What can you say about vitamin K in your ads and on your site?

The library supports 2 wordings for vitamin K; the strongest is “Supports normal blood clotting” (moderate, at least 11.25 µg a day). Avoid wording that names or implies a disease, a drug or a treatment, such as “Prevents or reverses artery calcification or heart disease”.

Also called: Vitamin K1, Vitamin K2, Phylloquinone, Phytonadione, Menaquinone-7, MK-7, Menaquinone-4, MK-4

Reviewed 15 October 2026

Not legal advice. This guide shows the wording that published evidence supports at a daily dose, from the sources linked below; it is not a ruling on any claim. Your own product, its form and dose, and your own evidence still need to match the wording you use.

Supported wordings

What you can say.

Moderate evidenceWording 1

Claims Facts

“Supports normal blood clotting.”

Daily dose	at least 11.25 µg a day
Support	Authorized in the EU after EFSA review; Health Canada lists no specific use.
Dose details	EU: at least 11.25 µg, 15% of the 75 µg EU reference value (Regulation (EU) No 1169/2011, Annex XIII). Health Canada’s monograph gives vitamin K1 and K2 at 6-120 µg a day for adults but lists no specific use for it.
Form	Vitamin K1 or K2, counted as total vitamin K
Source	Commission Regulation (EU) No 432/2012, list of permitted health claims

Moderate evidenceWording 2

Claims Facts

“Helps maintain normal bones.”

Daily dose	at least 11.25 µg a day
Support	Authorized in the EU after EFSA review; Health Canada lists no specific use.
Dose details	EU: at least 11.25 µg, 15% of the 75 µg EU reference value (Regulation (EU) No 1169/2011, Annex XIII). Health Canada’s monograph gives vitamin K1 and K2 at 6-120 µg a day for adults but lists no specific use for it.
Form	Vitamin K1 or K2, counted as total vitamin K
Source	Commission Regulation (EU) No 432/2012, list of permitted health claims

How strong the evidence is

Strong evidence: At least two listed sources support it independently at a comparable dose and form, and none disagrees.
Moderate evidence: One listed source supports it as an evidence-based use at that dose, and no listed source disagrees.
Limited evidence: The only support is traditional use, the sources disagree, or the source itself calls the evidence weak.

Wordings to avoid

What to leave out.

Claims Facts

Ingredient: Vitamin K

Wording to avoid	Reason
“Prevents or reverses artery calcification or heart disease”Names diseases.	Disease
“Prevents osteoporosis or fractures”Names diseases.	Disease

Disease: names or implies a disease. Drug: names a drug or presents the product as one. Treatment: promises to treat, cure or prevent a condition.

Sources

Where this comes from.

All ingredient guides

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