VitaminNo.013

Vitamin K2

Directs calcium to bones, supports clotting.

Typical / RDA90–120 mcg

Upper limitNone set

EvidenceModerate

How to take it

Timing With a mealFood With fatForm MK-7

What to know

Helps shuttle calcium into bone rather than arteries; often paired with vitamin D and calcium. Found in natto, cheese, and egg yolks.

Interactions & cautions

Interferes with warfarin — keep intake consistent and tell your doctor.

Do you actually need it?

Mainly relevant if supplementing high-dose D and calcium.

Questions people ask about vitamin k2

Vitamin K2 and Vitamin D3: Interaction, Absorption, and SafetyVitamin D3 and K2 are safe and synergistic. D3 aids calcium absorption, while K2 directs it to bones. Learn optimal timing and doses.
Can you take too much vitamin K2? Understanding safe daily dosesProbably not. Vitamin K2 has no established upper intake limit, meaning there is no known risk of toxicity from high doses for most people.
Is it safe to take Vitamin K2 if you are on blood thinners?Taking Vitamin K2 with blood thinners like warfarin requires careful management due to its role in blood clotting. Consistency is key, and always inform your doctor.
Do you need vitamin K2 if you already take calcium for bone health?Vitamin K2 helps direct calcium to bones, preventing soft tissue buildup. While calcium builds bone, K2 ensures proper utilization, making them complementary.

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Reference values: NIH Office of Dietary Supplements, adult general population. Educational information only — not medical advice. Confirm with a healthcare professional.