The Calcium Routing Problem
Supplementing calcium alone is not enough. Vitamin D3 boosts calcium absorption from the gut, while vitamin K2 directs that calcium into your bones and teeth — instead of allowing it to settle in arteries and soft tissues.
Each Nutrient’s Role
- Vitamin D3 — increases intestinal calcium and phosphorus absorption.
- Vitamin K2 — activates osteocalcin, the protein that binds calcium to bone matrix.
Who Should Consider Supplementing
People who spend most of the day indoors, follow a vegan diet, or are over 50 are at higher risk of low vitamin D. A combined D3 + K2 supplement is a simple, effective way to cover both bases.
Food sources of K2 include natto, hard cheeses and egg yolks — but daily amounts are often too small for a therapeutic effect.