Contains highly purified vitamin D3 (cholecalciferol) 

Vitamin D has key physiological properties.
 
Calcium homeostasis: critical for maintaining normal blood calcium levels, essential for bone health, requires adequate calcium levels and parathyroid hormone interaction.
 
Intestinal absorption: facilitates calcium and phosphorus absorption through the small intestine, enables efficient mineral uptake for skeletal and metabolic processes
 
Immunoregulatory functions:
regulates both innate and adaptive immune responses
promotes anti-inflammatory mechanisms: stimulates anti-inflammatory cytokines from Th2 cells, and suppresses Thl cells
transforms pro-inflammatory cell phenotypes to anti-inflammatory states 
Vitamin D3 optimal prevention 60-80 ng/mL (efficiency cutoff circa. 40 ng/mL)