Vitamin K2 (Menaquinone)
The underrated vitamin that tells calcium to go to your bones and arteries instead of floating around where it shouldn't be — it's a secret weapon for both bone and heart health.
Benefits
- +Directs calcium to bones and teeth where it belongs
- +May reduce arterial calcification (heart health)
- +Supports bone density and reduces fracture risk
- +Often taken alongside Vitamin D3 for synergistic effect
- +May support healthy skin
- +Important for proper blood clotting
Dosage & Cost
MK-7 (from natto) is the most common and practical form. MK-4 is also effective but has a shorter half-life. Almost always worth pairing with D3.
Side Effects
- !Generally very well tolerated
- !May interact with blood-thinning medications (warfarin)
- !Rare digestive upset
- !No well-documented toxicity at typical supplement doses
Food Sources
- • Natto (fermented soybeans) — by far the richest source
- • Fermented foods (sauerkraut, kefir)
- • Egg yolks
- • Butter and ghee from grass-fed cows
- • Cheese (especially aged cheeses)
References & Links
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This page is for informational purposes only. The information here has not been evaluated by the Food and Drug Administration (FDA). No supplement discussed on this page is intended to diagnose, treat, cure, or prevent any disease. Please consult your doctor or a qualified healthcare professional before taking any dietary supplement.