calcidiol

Calcidiol is an inactive form of Vitamin D found in the liver. The synonyms of calcidiol are 25- hydroxycholecalciferol (25-(OH)-cholecalciferol) or 25-hydroxyvitamin D (25-(OH)D). 

  •  Determining the plasma concentration of calcidiol provides information about the vitamin D reserves. Its activity is about 1% compared to the active form of vitamin D. 
  •  Calcidiol circulates in the bloodstream. When there is a lack of calcium or phosphate in the plasma, an enzyme 1-α-hydroxylase converts 25-(OH)D into 1.25 dihydroxy vitamin D3 in the kidney. It is an active form of Vitamin D called calcitriol.

Vitamin D: Sources, Health Benefits, Deficiencies

by
Activation of Vitamin D

Introduction Vitamin D is a fat-soluble vitamin. It helps the human body absorb and retain calcium and phosphorus essential for bone and teeth health.  Types and Sources of Vitamin D Sunlight is the main source of vitamin D (VD). However, The American Academy of Dermatology does not recommend getting it through unprotected sun exposure or … Read more