• Sarah Williams and Roschelle Heuberger.
• 1Department of HEV, Central Michigan University, Mt. Pleasant, MI; and 2Department of HEV, Central Michigan University, Mt. Pleasant, MI.
• Am J Ther. 2016 Nov 1; 23 (6): e1890-e1902.

AbstractVitamin D deficiency is known to be common in the general population and has been linked to all-cause mortality. The classically recognized role of vitamin D is its involvement in calcium and phosphorous homeostasis and bone health. Recent evidence suggests that vitamin D may also play a role in other nonskeletal processes, such as anti-proliferation, immunity, regulation of hormone section, and muscle strength. An extensive literature review of vitamin D and critical illness from 2000 to 2015 (PubMed and CINAL) produced multiple observational studies revealing a high prevalence of vitamin D deficiency in intensive care patients. Many of these studies have indicated that there is an association between vitamin D deficiency and clinical outcomes such as mortality, sepsis, duration of mechanical ventilation, and length of stay. This review article provides an overview of vitamin D physiology in adults, a summary of observational studies on vitamin D deficiency in critical illness, and an examination of the few clinical trials on vitamin D supplementation in intensive care patients.

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