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Vitamin D is an essential nutrient for your body. Most vitamin D can be gotten from sunlight. However, some people need to take extra vitamin D in the form of supplements. Research and write two or three paragraphs about who might have a vitamin D deficiency and about some of the disorders that are caused by this deficiency.

Healthcare professionals say that taking vitamin D supplements alone is not effective because vitamin D metabolism requires cofactors. Research and write a paragraph about what cofactors are needed for the body to efficiently use this nutrient.