Strong consensus on K2 MK-7/MK-4 benefits for bones and cardiovascular health, with active discussion around optimal dosing and synergistic supplements.
Life Extension Low-Dose Vitamin K2 as Menaquinone-7 (MK-7) delivers 45 mcg of the long-chain, highly bioavailable K2 form shown to remain active in the body longer than MK-4. MK-7 supports calcium utilization, healthy bone matrix formation, and cardiovascular function by activating K2-dependent proteins like osteocalcin and matrix Gla-protein. It's well-suited for adults seeking a conservative daily dose, particularly those already obtaining K2 from dietary sources or combining it with vitamin D3 supplementation.
Why It's Worth Considering: The low 45 mcg dose makes it a practical option for those wanting to supplement without exceeding conservative intake targets, and MK-7 derived from natto offers superior half-life compared to shorter-chain menaquinones.
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.
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.
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.
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.
Ask Gabriel for personalized stacking recommendations.
No significant interactions identified. Always consult your healthcare provider.
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
