Saturday, October 18, 2008

 

vitamine D

10 microgram vitamineD is gelijk aan 400 I.U.
October 14, 2008 — The American Academy of Pediatrics (AAP) has issued updated guidelines for vitamin D intake in infants, children, and teens to prevent rickets and vitamin D deficiency. The new recommendations were posted in the October 13 Early Release issue and will be published in the November 5 print issue of Pediatrics.

The recommendations were also presented at the American Academy of Pediatrics 2008 National Conference and Exhibition in Boston, Massachusetts.

The updated guidelines replace a 2003 AAP clinical report, which recommended a daily intake of 200 IU per day of vitamin D for all infants, from the first 2 months after birth, as well as for children and adolescents. The new recommendations call for a daily intake of 400 IU per day of vitamin D for all infants, children, and adolescents beginning in the first few days of life.

"Rickets attributable to vitamin D deficiency is known to be a condition that is preventable with adequate nutritional intake of vitamin D," write Carol L. Wagner, MD, Frank R. Greer, MD, and the AAP Section on Breastfeeding and Committee on Nutrition. "Despite this knowledge, cases of rickets in infants attributable to inadequate vitamin D intake and decreased exposure to sunlight continue to be reported in the United States and other Western countries, particularly with exclusively breastfed infants and infants with darker skin pigmentation. Rickets, however, is not limited to infancy and early childhood, as evidenced by cases of rickets caused by nutritional vitamin D deficiency being reported in adolescents."

The primary natural source of vitamin D is from skin synthesis from cholesterol after exposure to UVB light. Natural dietary sources of vitamin D are limited, and the amount of sunshine exposure sufficient for the cutaneous synthesis of vitamin D is not easily determined for a given individual. Furthermore, that amount of sunshine exposure may increase the risk for skin cancer. Therefore, the AAP has revised its 2003 recommendations to ensure adequate vitamin D status to include all infants, including those who are exclusively breast-fed, as well as older children and adolescents.

All infants and children, including adolescents, should have a minimal daily intake of 400 IU of vitamin D beginning soon after birth, according to these revised guidelines. The current recommendation for healthy infants, children, and adolescents is based on findings from new clinical trials as well as on the historical precedent of safely administering 400 IU of vitamin D per day in the pediatric and adolescent populations. Furthermore, ingestion of 400 IU of vitamin D daily appears to treat as well as to prevent rickets.

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