Thorne Research

Vitamin K

$31.00

SIZE: 60 Capsules

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The Promise

Identity & Key Ingredients Complete blend of K1 plus two K2 forms (MK-4, MK-7)

Thorne 3-K Complete supplies vitamin K as K1 and two distinct K2 forms in a single daily capsule.

Product identity

Thorne 3-K Complete — vitamin K formula in vegetarian hypromellose capsule.

Principal ingredients & amounts

Vitamin K total 6,090 mcg per capsule: K2 as MK-4 (5 mg), K1 (1 mg), K2 as MK-7 (90 mcg).

Formulation highlights

Single-capsule serving contains three distinct vitamin K vitamers to cover differing tissue distribution and half-lives.

Dietary & quality facts

Other ingredients: microcrystalline cellulose, hypromellose capsule (derived from cellulose), silicon dioxide, mixed tocopherols (vitamin E). 60 capsules per container.

Why It Works

Why this formulation is distinct Specific forms, doses, and complementary kinetics

Each listed fact explains concrete formulation choices and their supported roles.

01

Includes three K vitamers

Contains K1 plus K2 as MK-4 and MK-7 to provide differing tissue targets and blood presence durations.

02

MK-4 dose (5 mg)

Provides a rapid-acting K2 form at 5,000 mcg (5 mg) per capsule.

03

MK-7 dose (90 mcg)

Includes longer‑lasting K2 as MK-7 at 90 mcg to sustain blood levels.

04

K1 dose (1 mg)

Supplies 1,000 mcg (1 mg) of vitamin K1, the form primarily transported to the liver.

Reviews

Customer Reviews

Your Journey

Use, storage, and safety Clear directions, warnings, and practical considerations

How to take it, precautions, and ingredients to note from the label.

Directions

Suggested use

Take 1 capsule one to two times daily or as recommended by your health‑care practitioner. Serving size: one capsule.

Storage & format

Format and quantity

Vegetarian hypromellose capsule; 60 capsules per container.

Warnings

Allergy, pregnancy, interactions

Contraindicated with hypersensitivity to ingredients. If pregnant, consult your health‑care practitioner before using. Vitamin K interferes with anticoagulant drugs (like Coumadin); avoid concurrent use.

Other label ingredients

Non‑active components

Contains microcrystalline cellulose, silicon dioxide, hypromellose capsule (cellulose‑derived), and mixed tocopherols (vitamin E).

Product education

3-K Complete: A Comprehensive Vitamin K Formula for Bone and Heart Health

Thorne’s 3-K Complete is an advanced vitamin K formula that provides a comprehensive blend of the three most important and well-researched forms of vitamin K: K1, K2 as MK-4, and K2 as MK-7. This complete formula is designed to provide robust support for bone and cardiovascular health by ensuring the body can properly utilize calcium. It is an ideal foundational supplement for individuals seeking to maintain healthy bone density, promote flexible arteries, and support a healthy clotting process.*

How It Works: The Synergistic Power of Three K Vitamins

This formula leverages the unique, complementary actions of each form of vitamin K, which are distributed differently and have different half-lives in the body, providing a full spectrum of benefits.*

Directing Calcium for Bone and Arterial Health
While Vitamin D aids in calcium absorption, Vitamin K is the crucial nutrient that directs calcium to where it’s needed. Vitamin K1 is primarily transported to the liver and is essential for synthesizing the proteins that control normal blood clotting. The two forms of Vitamin K2 (MK-4 and MK-7) are more active in the rest of the body. They activate key proteins—osteocalcin for binding calcium to bone and matrix Gla protein for keeping calcium out of arteries and soft tissues. MK-4 is the most rapidly absorbed form, while MK-7 provides a more sustained presence in the bloodstream.*

Comprehensive Support for a Healthy Body
By providing this complete trio, 3-K Complete ensures support for both the liver and other tissues. This synergistic action is fundamental for building and maintaining strong bones, promoting the elasticity of blood vessels, and supporting overall cardiovascular wellness. It is the most comprehensive vitamin K formula available for those committed to healthy aging.*

  • Provides a complete blend of Vitamin K1 and two forms of Vitamin K2 (MK-4, MK-7)
  • Promotes healthy bone density by directing calcium to bones*
  • Supports cardiovascular health and flexible arteries*
  • Essential for the body’s normal blood-clotting process
  • The most comprehensive Vitamin K formula for foundational support*

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: Take 1 capsule one to two times daily or as recommended by your health-care practitioner.
Serving Size: One Capsule
Servings Per Container: 60
Ingredient Amount %DV
Vitamin K 6,090 mcg 5,075%
K2 (5 mg as MK-4)
K1 (1 mg)
K2 (90 mcg as MK-7)
Other ingredients: Microcrystalline Cellulose, Hypromellose (derived from cellulose) capsule, Silicon Dioxide, Vitamin E (Mixed Tocopherols).
*Daily Value (DV) not established.
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 anti-coagulant drugs (like Coumadin), the concurrent use of these agents should be avoided.