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Bone health, Vascular health
Adults with low dietary vitamin K intake or those focusing on daily bone and vascular wellness support.
Take 1 capsule once or twice daily, preferably with food to aid absorption of this fat-soluble vitamin; take at the same time each day for consistent intake.
Gluten Free; Contains: vitamin E (mixed tocopherols).
MK-4 acts as a cofactor for gamma-carboxylation of vitamin K–dependent proteins, which may support calcium placement in bone and normal blood vessel function.
Caution: High vitamin K intake can affect vitamin K–antagonist anticoagulants; people using these medicines should seek medical guidance due to potential changes in clotting control.
Vitamin K1 supports activation of vitamin K–dependent proteins involved in normal blood clotting and calcium balance.
Caution: Those with limited vitamin K intake for anticoagulant management should be aware this adds significant vitamin K, which could alter medication effects.
MK-7 has a longer half-life than K1 and MK-4, supporting ongoing activation of proteins that regulate calcium use in bones and vessels.
Caution: May interact with vitamin K–antagonist anticoagulants; consistency of vitamin K intake is important to avoid fluctuations in clotting status.
MK-4 provides a higher-dose, faster-acting form of vitamin K2, while MK-7 offers longer-lasting activity to keep vitamin K–dependent proteins active over time; K1 complements them by supporting the broader vitamin K cycle. Together they cover immediate and sustained activation of proteins that guide calcium to bones and away from soft tissues.
Label Warning: If pregnant, consult a healthcare practitioner before use. Vitamin K may interfere with anticoagulant medicines such as warfarin; concurrent use should be avoided.
Who should be cautious: People taking anticoagulants such as warfarin should be cautious due to potential interaction. Those with clotting disorders or who are managing blood-thinning therapy should discuss use with a healthcare provider. As this product contains Vitamin K, if you take anticoagulants, it is recommended to consult a healthcare provider before combining with medications that may cause interaction.
Storage: Store tightly sealed in a cool, dry place.
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Calcium and Vitamin K may support bone strength, with Vitamin K helping to regulate calcium in the body.
AI generated. Not medical advice.
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Helps maintain bone mineral density and supports healthy blood vessels.
Thorne's Vitamin K contains three clinically studied forms of vitamin K – vitamin K1, and two forms of vitamin K2 (MK-4 and MK-7). It contains significantly more MK-4 than most other multiple-K products on the market.
Take 1 capsule one to two times daily or as advised by your healthcare practitioner.
Microcrystalline cellulose, hypromellose (derived from cellulose) capsule, silicon dioxide, vitamin E (mixed tocopherols).
Manufactured in the USA using US & imported ingredients.
Tamper Evident: Use only if the bottle is sealed. Store tightly sealed in a cool, dry place.
If pregnant, consult your healthcare practitioner before using this product.
As vitamin K interferes with the effect of anticoagulant drugs (like Warfarin), the concurrent use of these agents should be avoided.
While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally be despatched with alternative packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and do not rely solely on the information provided by iHerb. This website has been machine translated as a courtesy to customers. iHerb does not represent or warrant that the translations are complete or error-free and iHerb is not responsible for any translation errors or omissions.
| Supplement information | ||
| Serving Size:One Capsule | ||
| One Capsule Contains: | %DV | |
| Vitamin K | 6,090 mcg | 5,075% |
| K2 (5 mg as MK-4) | ||
| K1 (1 mg) | ||
| K2 (90 mcg as MK-7) | ||
| Reference Intake (DV) | ||
