Bone mineral density and fracture resistance.
These biological pathways drive progress toward bone health.
Depositing minerals into bone matrix.
Hormone-like vitamin. VDR receptors present in Leydig cells. Supplementation matters mainly in deficiency.
Activates osteocalcin for bone calcium deposition. Synergistic with D3.
Cofactor in 300+ enzymes. Forms differ in bioavailability and GI tolerance [citation:27][citation:33].