Vitamin K2
Menaquinone-7 (MK-7)
Last reviewed: June 2026 · Medically reviewed by a licensed pharmacist
What it does
Think of K2 as a traffic director for calcium. It activates the proteins that guide calcium into your bones and teeth, where you want it, and help keep it out of your arteries and soft tissue, where you don't. That's why it pairs so naturally with vitamin D and calcium. It's hard to get enough from a typical diet.
The science
Vitamin K2 activates osteocalcin and matrix Gla protein, directing calcium to bones and preventing arterial calcification. Often missing from modern diets.
Most relevant for
Anyone taking vitamin D or calcium, and bone-health focus.
Key references
General wellness information, not medical advice. Consult your healthcare provider before starting any supplement. Build your personalized stack →