Effect Of Vitamin D On Performance Of Ruminant Animal: A Review
Mehdi Eshaghian*1, Hamed AminiPour1, Mahnaz Ahmadi Hamedani1, Ali Akbar JannatAbadi1, Mehdi Ramshini1
Department of Veterinary, Islamic Azad University of Sabzevar, Sabzevar, Iran.
Abstract: Vitamin D is thought of as the “sunshine vitamin” because it is synthesized by variousmaterials when they are exposed to sufficient sunlight. The 2 major natural sources of vitamin D arecholecalciferol and ergocalciferol. In this chapter, the term vitamin D in the absence of a subscript willimply either vitamin D2 o vitamin D3. Under modern farming conditions, some animals, especially poultry are raised in total confinement with little or no exposure to natural sunlight. Even though with enough sunlight exposure, vitamin D is not needed in the diet, it still fits the definition of avitamin in all respects for animals and humans that are confined indoors away from the sun. Inrecent years vitamin D receptors have been found in tissues not associated with the traditional roleof calcium metabolism. The additional role of vitamin D awaits further elucidation.
[Mehdi Eshaghian, Hamed AminiPour, Mahnaz Ahmadi Hamedani, Ali Akbar JannatAbadi, Mehdi Ramshin. Effect Of Vitamin D On Performance Of Ruminant Animal: A Review. J Am Sci 2013;9(3):130-138]. (ISSN: 1545-1003). http://www.jofamericanscience.org. 18
Keyword: Vitamin D, Performance,Ruminant Animal. Full Text 18