Vitamin K2 as MK-4, 180 Capsules
Carlson Labs Vitamin K2 as MK-4 delivers menaquinone-4, the bioactive form of K2 found naturally in animal-based foods, to support bone metabolism and cardiovascular health.
May be a fit for
- Adults seeking MK-4 support for bone mineral density maintenance
- Individuals on long-term vitamin D supplementation wanting complementary K2 as MK-4
- Those looking to support healthy calcium utilization with the MK-4 form
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Carlson Labs Vitamin K2 as MK-4 delivers menaquinone-4, the bioactive form of K2 found naturally in animal-based foods, to support bone metabolism and cardiovascular health. MK-4 works by activating proteins that help direct calcium to bones rather than soft tissues, making it a practical option for adults focused on skeletal and arterial wellness.
Why It's Worth Considering: Carlson uses the MK-4 form specifically, which has a well-established research profile in bone health studies, and the brand maintains a long-standing reputation for quality manufacturing and third-party potency testing.
Product details
Who it may suit
May be a fit for
- Adults seeking MK-4 support for bone mineral density maintenance
- Individuals on long-term vitamin D supplementation wanting complementary K2 as MK-4
- Those looking to support healthy calcium utilization with the MK-4 form
- Older adults maintaining skeletal integrity with bioavailable MK-4 daily
Considerations
- Taking warfarin/Coumadin (K2 counteracts warfarin — consult physician)
- Other vitamin K-dependent anticoagulants
- Note: K2 does NOT interact with non-vitamin-K blood thinners like Eliquis or Xarelto
Compatibility & interactions
Works Well With
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Take Separately From
No significant interactions identified. Always consult your healthcare provider.
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A few useful answers.
Research & further reading
More category questions
What is the difference between K1 and K2?
Vitamin K1 (phylloquinone) is for blood clotting — abundant in leafy greens. Vitamin K2 (menaquinone) directs calcium metabolism — puts calcium in bones and keeps it out of arteries. Most people get enough K1 from diet but are deficient in K2, which is found mainly in fermented foods (natto, certain cheeses) and animal liver.
What is MK-7 and why is it the preferred form?
MK-7 is the most bioavailable and longest-acting form of K2, with a half-life of ~3 days (vs ~1 hour for MK-4). This means a single daily dose maintains therapeutic blood levels 24/7. MK-7 is derived from natto (fermented soybeans) and has the strongest clinical evidence for bone density and arterial health.
How much vitamin K2 should I take?
For general health with D3: 100-200mcg MK-7 daily. For osteoporosis: 180-360mcg. For cardiovascular calcification prevention: 180-200mcg. The dose should scale with your D3 intake — higher D3 doses require more K2 to handle the increased calcium absorption.
Can I take K2 if I'm on blood thinners?
If you're on warfarin/Coumadin: NO — K2 counteracts warfarin and will destabilize your INR. Consult your cardiologist. If you're on newer anticoagulants (Eliquis/apixaban, Xarelto/rivaroxaban, Pradaxa/dabigatran): these are NOT vitamin K-dependent, so K2 is safe. Always confirm with your prescribing physician.
Supplement information is provided for education and is not a substitute for personalized medical advice. Supplements are not intended to diagnose, treat, cure or prevent disease. Read the current product label before use.