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Bone health, Vascular health
Adults seeking daily bone and vascular support or those with diets low in leafy greens and fermented foods.
Take 1 capsule 1 to 2 times daily with a meal; taking with food may enhance absorption of fat-soluble vitamins.
Gluten Free; Contains: vitamin E (mixed tocopherols).
MK-4 acts as a cofactor for gamma-carboxylation of vitamin K–dependent proteins like osteocalcin and matrix Gla protein, which may support calcium placement in bone and normal vessel elasticity.
Caution: Consult a health professional if you use anticoagulant medications, as vitamin K can counteract their effects.
Vitamin K1 functions as a cofactor for activating vitamin K–dependent proteins involved in normal blood clotting and bone-related protein activity.
Caution: Those on blood-thinning therapies should seek guidance because vitamin K can reduce the intended effect of such drugs.
MK-7 supports sustained activation of vitamin K–dependent proteins like osteocalcin and matrix Gla protein due to its longer half-life, which may aid calcium utilization in bone and vascular balance.
Caution: If you have a bleeding disorder or use anticoagulants, consult a professional because vitamin K can interfere with these medications.
MK-4 provides a higher-dose, fast-acting form of K2, while MK-7 offers longer-lasting activity; together they help keep vitamin K–dependent proteins activated over time. K1 complements K2 by supporting the vitamin K cycle and overall availability for carboxylation processes.
Label Warning: If you are pregnant, consult a healthcare practitioner before use. Vitamin K may interfere with anticoagulant drugs such as warfarin (Coumadin); avoid concurrent use.
Who should be cautious: People taking anticoagulants such as warfarin should avoid use. Those with clotting disorders or who are scheduled for surgery may need medical guidance. Because this product contains vitamin K, individuals on anticoagulants are recommended to consult a healthcare provider before combining with medications that may interact.
Storage: Store tightly sealed in a cool, dry place.
Many users say the capsules go down smoothly and do not leave an aftertaste.
Some reviewers mention feeling better overall and note reduced plaque buildup on teeth.
A few customers feel the quality is lower compared to other brands.
This product is guaranteed authentic and backed by our easy returns & refunds policy. Details
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 recommended by your health-care 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 bottle is sealed. Store tightly sealed in a cool, dry place.
If pregnant, consult your health-care practitioner before using this product.
As vitamin K interferes with the effect of anticoagulant drugs (like Coumadin), 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 ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
| Supplement facts | ||
| 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) | ||
| Daily Value (DV) | ||
