Calcium is a vital mineral for strong bones, healthy muscles, and proper nerve and heart function. Most calcium is stored in bones, where it strengthens the skeleton. To regulate blood calcium levels, the body relies on a balance of hormones and nutrients, including vitamin D in its active form, calcitriol.

1. Why Vitamin D Matters:

   • Calcitriol helps your body absorb calcium from food. Without it, absorption drops dramatically (to about 10-15%), but with enough calcitriol, absorption can increase to 30-40%.

2. Calcium Imbalances: