The American Academy of Pediatrics has doubled its recommendation for the daily dose of vitamin D that children should take to try to prevent diseases, such as rickets, and they say that this decision could have life-long benefits. It is now recommended that children receive 400 international units of vitamin D per day, starting in the few days of their life.
Not getting enough vitamin D can result in the disease rickets, which causes bone-softening, stunted growth, and skeletal deformities if it is not corrected while the child is young. Babies that are breast-fed have a big risk of being vitamin D deficient but these babies can be given supplements of the vitamin.
Good sources of vitamin D include exposure to sunlight, vitamin D fortified milk, fortified cereals, tuna, mackerel, and sardines.