![]() Newborn infants: who are absolutely breastfed require vitamin D supplements because mother milk does not contain significant levels of the vitamin. Older people (> 50 years) due to: The decrease of ability of skin to convert 7- dehydrocholesterol to pre-vitamin D3. PEOPLE AT GREATER RISK OF DEVELOPING VITAMIN D DEFICIENCY 1. Regulation of cell growth and development (particularly WBCs and epithelial cells). Integrated function with parathyroid hormonein stabilization of Ca++ level in blood. Essential for normal bone growth during childhood and for maintaining bone density and strength during adulthood (as it increases Ca++ absorption from foods + increases Ca++ deposition into the skeleton). A fall in blood Ca++ stimulate active vitamin D production stimulates Ca++ absorption from food + release of Ca++ from bones + renal excretion of Ca++.Ģ. ![]()
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