A new systematic review and meta-analysis published in the Frontiers in Nutrition journal provides important evidence that vitamin D supplementation can reduce the risk of death among critically ill adults. Analyzing 21 randomized controlled trials, the review found that supplementation significantly reduced overall mortality, with the strongest benefits seen in patients who were vitamin D deficient, those receiving doses of up to 300,000 IU, and those given vitamin D by injection. The findings provide further evidence that doctors need to begin taking nutritional support as seriously as they do drugs, surgery, and other standard medical treatments.