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Catalog/Vitamin K
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Vitamin K

💊Capsule
🦴Bone Support❤️Heart Health
🔬Third-Party🏭GMP📊Clinical EvidenceHigh Bioavailability💪Optimal Doses

Helps maintain bone mineral density and supports healthy blood vessels* Each capsule of Thorne's Vitamin K formula provides 3 clinically studied forms of vitamin K – vitamin K1 and two types of K2 (MK-4 and MK-7) – for comprehensive blood vessel and bone support.*

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Overview

Helps maintain bone mineral density and supports healthy blood vessels* Each capsule of Thorne's Vitamin K formula provides 3 clinically studied forms of vitamin K – vitamin K1 and two types of K2 (MK-4 and MK-7) – for comprehensive blood vessel and bone support.*

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.

Active Ingredients

2× DAILYAmounts shown are the daily total. Take 1 capsule one to two times daily or as recommended by your health-care practitioner.
12180mcg
2× 6090mcg/serving
10150% DV
OPTIMALGOOD
2mg
2× 1mg/serving
367% TR
OPTIMALGOOD
K2
MK-4
10mg
2× 5mg/serving
1835% TR
OPTIMALHIGH BIO
K2
MK-7
180mcg
2× 90mcg/serving
33% TR
OPTIMALHIGH BIO

Other Ingredients

Microcrystalline Cellulose, Hypromellose (derived from cellulose) capsule, Silicon Dioxide, Vitamin E (Mixed Tocopherols)

Product Info

Serving Size
1 capsule
Servings
60
Price
$31.00
Per Serving
$0.52
Form
capsule

Where to Buy

Links may contain affiliate partnerships. See our disclosure for details.

Certifications

Gluten FreeSoy FreeDairy FreeDerived From Natural FlavorsDerived From Natural ColorsMade in USAThird-Party Contents CertifiedThorne VerifiedGMP

Score Breakdown

Evidence Quality
25%100
All ingredients have Grade A evidence
Evidence grades: A(5)
Dose Adequacy
20%95
Optimal: Vitamin K, K2 (as MK-7), K2 (as MK-4), K1
Reference coverage: 100%
Form/Bioavailability
20%91
2 high bioavailability: K2 (MK-7), K2 (MK-4)
2 good: Vitamin K (standard), K1 (standard)
Excellent form quality - premium bioavailable forms
Primary ingredient Vitamin K could use a higher bioavailability form
Transparency
10%100
Full disclosure - all doses labeled
Safety/Redundancy
10%86
DANGER: vitamin_k + Blood thinners — Reduced anticoagulant effect; increased clotting risk
Drug interactions: Warfarin - must keep intake consistent
Contraindications: Other vitamin K antagonist anticoagulants, Warfarin users (without physician guidance)
May interact with: Warfarin - must keep intake consistent
Consult healthcare provider if taking medications
Review if you have: Other vitamin K antagonist anticoagulants, Warfarin users (without physician guidance)
Manufacturing Quality
10%82
Third-party testing verified
Certifications: Third-party tested, GMP Certified
NSF Certified products ensure contaminant-free manufacturing
Missing: NSF Certified for Sport, USP Verified
Overall Score93/100

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