Vitamin K2 MK-4

Within Vitamin K2, this term helps answer a practical question: Is the Vitamin K2 ingredient specifically identified as MK-4 or menaquinone-4?

Someone may explore this term when classifying MK-4 in a standalone Vitamin K2 product or a broader formulation. It provides the precise ingredient identity before considering MK-7, generic Vitamin K2 references, Vitamin K1, finished products, formulation structures, delivery formats, or Educational Contexts associated with Vitamin K.

Why this ingredient matters

Vitamin K2 is a family of menaquinones rather than one single ingredient form. Identifying MK-4 separately helps prevent menaquinone-4 from being grouped under the broad Vitamin K2 category when the exact form is known.

Vitamin K2 MK-4 serves as the specific ingredient term when the label uses MK-4 or menaquinone-4. It remains distinct from MK-7 and other recognized menaquinone forms.

This classification does not determine whether MK-4 is preferable, better absorbed, or more appropriate than another Vitamin K2 form. Ingredient identity, source, dose, formulation, intended use, and individual circumstances must be evaluated separately.

How Vitamin K2 MK-4 fits within Nutrient Families & Ingredients

Vitamin K2 MK-4 is a concept term beneath Vitamin K2, the menaquinone family within the broader Vitamin K nutrient family.

Within that family, Vitamin K2 MK-4 identifies menaquinone-4 specifically. It should be mapped directly whenever the ingredient label provides that level of detail.

This term should not be used for Vitamin K1, Vitamin K2 MK-7, generic Vitamin K2 references when the exact form is unknown, or broad Vitamin K references.

What belongs here

• Vitamin K2 MK-4 listed as an ingredient
• Menaquinone-4 listed on an ingredient or supplement facts panel
• Standalone products that specifically contain MK-4
• Broader formulations that identify menaquinone-4
• Ingredient mappings where the MK-4 form is known

What does not belong here

Do not use this term for Vitamin K1, phylloquinone, or phytonadione.

Do not use this term for Vitamin K2 MK-7 or menaquinone-7.

Do not use this term for generic Vitamin K2 references when the label does not identify the menaquinone form.

Do not use this term for broad Vitamin K references when neither the K2 family nor MK-4 is established.

Common areas of overlap

Vitamin K2 MK-4 overlaps most closely with the broader Vitamin K2 family. Use MK-4 when the ingredient is explicitly identified as MK-4 or menaquinone-4. Use Vitamin K2 when the exact menaquinone form is unknown or family-level mapping is sufficient.

It also overlaps with Vitamin K2 MK-7. Both belong within the Vitamin K2 family, but they are distinct menaquinone forms and should not be used interchangeably.

The term may overlap with Supplement Categories and Formulation Structures when MK-4 appears in a standalone supplement, multivitamin, or broader nutrient formula. Those classifications should be mapped separately from ingredient identity.

Educational Contexts may explain why MK-4 is discussed in relation to bone health, circulation, or other topics. Those contexts do not change the ingredient classification.

A practical example

A supplement facts panel lists Vitamin K2 as menaquinone-4. The ingredient should be mapped directly to Vitamin K2 MK-4 because the specific menaquinone form is identified.

If another product lists only Vitamin K2 without naming MK-4 or MK-7, the broader Vitamin K2 term should be used instead.

How to use this reference page

Use this page when classifying or explaining Vitamin K2 specifically identified as MK-4 or menaquinone-4.

When reviewing a possible use, ask whether the label names MK-4, menaquinone-4, MK-7, generic Vitamin K2, Vitamin K1, or only broad Vitamin K. Use Vitamin K2 MK-4 only when the specific MK-4 form is identified.

This page supports consistent classification within the Supplement Education Model. It is a reference for organizing nutrient and ingredient identity and does not determine whether an MK-4 dose, formulation, combination, or product is appropriate for any individual.