ByDr. Brennan Commerford, Chiropractic Physician·Last reviewed: April 2026
All Ingredients
Vitamin1 form

Vitamin K2 (as Menaquinone-7)

Preferred Form
MK-7
Bioavailability
S1
Evidence Level
Moderate Evidence

Quick Answer

What is the best form of Vitamin K2 (as Menaquinone-7)?

MK-7 is our top-ranked form of Vitamin K2 (as Menaquinone-7), classified as T1 Preferred with S1 bioavailability. We compared 1 forms in our formulary.

Our recommendation: MK-7

1forms compared

All Forms of Vitamin K2 (as Menaquinone-7)

FormTierBioavailabilityDose RangeUnit
MK-7T1 PreferredS1

Bioavailability by Form

S1 — Best
MK-7

What is Vitamin K2 (as Menaquinone-7)?

Vitamin K2 (as Menaquinone-7) is a Vitamin supplement available in 1 form.

Not all forms of Vitamin K2 (as Menaquinone-7) are equal. The form you choose determines how much Vitamin K2 (as Menaquinone-7) actually reaches your tissues, and the difference between the best and worst forms can be substantial. MK-7 has a 72-hour half-life vs 1-2 hours for MK-4, enabling once-daily dosing with sustained tissue-level activity. Clinical trials demonstrate MK-7 superiority for osteocalcin carboxylation (bone health marker) and matrix Gla-protein activation (arterial calcification prevention) at doses as low as 180mcg/day.

Forms of Vitamin K2 (as Menaquinone-7) Compared

Vitamin K2 (as MK-7) Preferred (T1 Preferred) has a bioavailability rating of high (S1 — best tier). Typical dose range: not yet documented in our database.

What the Research Shows

Menaquinone-7 (MK-7) is the most bioactive form of vitamin K2, with a significantly longer half-life (72 hours) compared to MK-4 (1-2 hours). This allows for once-daily dosing with sustained tissue-level activity. Multiple clinical studies support MK-7 for bone mineral density maintenance and cardiovascular health, particularly in combination with vitamin D3 and calcium.

PMID: 23140417

How to Choose the Right Form

Vitamin K2 (as MK-7) is classified as T1 Preferred in the FormulaForge formulary — our top recommendation for Vitamin K2 (as Menaquinone-7). It carries a bioavailability rating of high (S1 — best tier), meaning more of the active compound reaches your tissues per dose unit compared to lower-tier forms.

When choosing a Vitamin K2 (as Menaquinone-7) supplement, look for the S1 (best absorption) bioavailability tier on the label or formulary listing. T1 Preferred forms have the strongest research-backed evidence for efficient absorption.

Other forms may be appropriate depending on individual goals, cost considerations, and your healthcare provider’s guidance. The best form for you depends on your specific health needs.

Dosing & Safety

For Vitamin K2 (as MK-7), the typical dosing range is not yet documented in our database. Individual dose requirements vary based on health goals, body weight, and existing nutrient intake.

Side Effects: Specific side effect data for these forms is not yet documented in our database. In general, consult your healthcare provider regarding tolerability at higher doses.

These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before starting or changing a supplement regimen.

The Science

The following studies and findings inform our formulary classifications for Vitamin K2 (as Menaquinone-7):

PMID: 23140417

Dosing Guidance

Dosing information not yet available for this ingredient.

Frequently Asked Questions

What is the best form of Vitamin K2 (as Menaquinone-7)?
Vitamin K2 (as MK-7) is the T1 Preferred form of Vitamin K2 (as Menaquinone-7) in the FormulaForge formulary, reflecting research-backed evidence for superior bioavailability (high (S1 — best tier)). This classification is based on published absorption studies and clinical evidence quality. The best form for you depends on your individual health goals and your healthcare provider's recommendations. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
How much Vitamin K2 (as Menaquinone-7) should I take daily?
Dosing information for Vitamin K2 (as Menaquinone-7) is being compiled in our database. Individual dose requirements vary based on health goals and existing nutrient intake. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What are the benefits of Vitamin K2 (as Menaquinone-7)?
Vitamin K2 (as Menaquinone-7) has been studied for its role in supporting: Supports healthy calcium metabolism and bone mineral density, Supports cardiovascular health by directing calcium away from arterial walls, Supports healthy blood clotting cascade, Synergizes with vitamin D3 for optimal calcium utilization. Menaquinone-7 (MK-7) is the most bioactive form of vitamin K2, with a significantly longer half-life (72 hours) compared to MK-4 (1-2 hours). This allows for once-daily dosing with sustained tissue-level activity. Multiple clinical studies support MK-7 for bone mineral density maintenance and cardiovascular health, particularly in combination with vitamin D3 and calcium. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
When is the best time to take Vitamin K2 (as Menaquinone-7)?
Optimal timing for Vitamin K2 (as Menaquinone-7) supplementation depends on the specific form, dosage, and individual factors. Some forms may be better absorbed with food; others may not require food. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
Are there side effects of taking Vitamin K2 (as Menaquinone-7)?
Tolerability of this Vitamin supplement varies by individual, dose, and specific form. Some individuals may experience gastrointestinal discomfort at higher doses. Specific side effect profiles for each form of Vitamin K2 (as Menaquinone-7) are documented in our formulary where available. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What forms of Vitamin K2 (as Menaquinone-7) are available?
There are 1 form of Vitamin K2 (as Menaquinone-7) in our formulary: Vitamin K2 (as MK-7) (T1 Preferred, bioavailability: high (S1 — best tier)). Forms differ in chemical structure, bioavailability, and typical dose range. FormulaForge classifies forms by tier based on published bioavailability evidence.

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References

  1. PubMed

FormulaForge formulates and sells supplements containing the ingredients discussed on this page. Our formulary recommendations are based on peer-reviewed bioavailability research. All cited studies are independently verifiable.