Decreased circulating levels of active vitamin D metabolites, including 25-hydroxyvitamin D (25D) and 1,25-dihydroxyvitamin D (1,25D), are common in critically ill patients, and lower levels are independently associated with a higher risk of acute kidney injury (AKI). Further, administration of 25D and 1,25D attenuates AKI in animal models. The purpose of this study is to assess if administration of 25D and 1,25D decreases the incidence and severity of AKI in critically ill patients.
