Why it’s the hidden joint protector
Vitamin K2 activates matrix Gla protein (MGP) — which prevents calcium from depositing in soft tissues (joints, arteries, cartilage). Without enough K2, calcium builds up in joints → stiffness, reduced flexibility, and faster cartilage wear.
Strongest evidence
- Studies show higher K2 intake correlates with lower osteoarthritis severity and less joint calcification.
- MK-7 supplementation (180–360 mcg/day) reduces morning stiffness and improves mobility in early OA patients.
Who is most at risk
- Low intake of fermented foods (natto is richest source)
- Long-term antibiotics (kill gut bacteria that produce K2)
- High vitamin D without K2 (D increases calcium absorption — K2 directs it properly)
Practical daily target
- 100–200 mcg MK-7 (best absorbed form)
- Food sources: natto (1–2 tbsp = 300–500 mcg), hard cheeses (gouda, edam, brie), egg yolks
- Supplement: 100–180 mcg MK-7 daily (with fatty meal)
3. Vitamin B12 (Especially Methylcobalamin Form)
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