Vitamin K2
Scored by the Formulate Research Team · Last reviewed May 2026
Overview: Thorne Vitamin K2
A concentrated liquid form of an extensively studied form of vitamin K2 to help maintain bone mineral density* Vitamin K2 provides support for bone, heart, and blood vessel health.*
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Vitamin K2MK-4 | 45 mg |
Certifications & Testing
Other Ingredients
Medium Chain Triglycerides, Mixed Tocopherols
Recommended Use
Take 15 drops one to three times daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS As Vitamin K interferes with the effect of anticoagulant drugs (like Coumadin), the concurrent use of these agents should be avoided.
Frequently Asked Questions
What is Thorne Vitamin K2's Formulate score?
Thorne Vitamin K2 scores 97 out of 100 (grade A) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne Vitamin K2 worth it?
Thorne Vitamin K2 scores 97/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne Vitamin K2?
Each serving contains Vitamin K2 (45 mg). Serving size: 15 Drops. 80 servings per container.
How do I take vitamin k2?
Take 15 drops one to three times daily or as recommended by your health-care practitioner.
Who makes Vitamin K2?
Vitamin K2 is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne Vitamin K2 third-party tested?
Thorne lists the following certifications and testing for this product: NSF Certified, Gluten Free, Dairy Free, Soy Free, Thorne Verified, Natural Flavors, Natural Colors, GMP Certified.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.