Role of a good vitamin D status in fighting infections
Vitamin D | Dietary Reference Intakes: The Essential Guide to Nutrient Requirements | The National Academies Press
Natures Aid Vitamin D3 Drops for Infants and Children (400 iu/5 ug, 50 ml, Drop | eBay
Vitamin D in health and disease: an insight into traditional functions and new roles for the 'sunshine vitamin' | Nutrition Research Reviews | Cambridge Core