La vitamina D es un nutriente que el cuerpo necesita, junto con el calcio, para formar los huesos y mantenerlos sanos. El cuerpo puede absorber el calcio solamente si tiene suficiente vitamina D. El calcio es un componente fundamental de los huesos. La vitamina D también cumple muchas otras funciones en el organismo. Es fundamental para el sistema inmunitario y ayuda al funcionamiento de los , Vitamin D toxicity is a rare condition that happens when too much vitamin D is in the body. The condition can have serious effects on health. Another name for it is hypervitaminosis D. Cause of vitamin D toxicity Vitamin D toxicity usually is caused by taking large doses of vitamin D supplements., Research suggests that vitamin D has a positive effect on the immune system. Experts need to better understand how vitamin D might affect MS. There's also an association between sunlight exposure and the risk of MS. Sunlight is the body's most efficient source of vitamin D. The farther away from the equator a person lives, the higher the risk , A vitamin D deficiency means you don't have enough vitamin D in your body. Too little of vitamin D makes bones weak. But the link between vitamin D and blood pressure isn't clear. Vitamin D may change how some body chemicals control blood pressure. The vitamin also seems to keep the lining of blood vessels flexible and healthy., Vitamin D supplementation depends on whether you breastfeed your baby or how much formula with vitamin D your baby drinks. These are the guidelines from the American Academy of Pediatrics for vitamin D for babies: Breastfed or partly breastfed babies need 400 international units (IU) of liquid vitamin D a day. This should start soon after birth., Rickets is the softening and weakening of bones in children, often because of an extreme and prolonged vitamin D or calcium deficiency. Rare inherited problems also can cause rickets. Vitamin D helps a child's body absorb calcium and phosphorus from food. Not enough vitamin D makes it hard to maintain proper calcium and phosphorus levels in bones, which can cause rickets. Adding vitamin D or .