The administration of a high single dose of vitamin D (300,000 IU by intramuscular injection) in critically ill patients significantly reduces mortality, length of stay in intensive care, and the need for mechanical ventilation.

noli's read

This advice is based on a randomized controlled pilot study (RCT) published in 'PLOS ONE' concerning patients suffering from acute respiratory distress. The observed results, particularly the reduction in mortality, are statistically impressive and consistent with the immunomodulatory role of vitamin D. However, it is crucial to note that this is a pilot study with a small sample size, which limits the scope of the conclusions for the general population or other pathologies. While the link between optimal vitamin D status and an improved immune response is widely documented by meta-analyses, the efficacy of a single 'bolus dose' in the acute phase remains a subject of active research and not a standardized clinical protocol. The creator faithfully reports the data from this specific study, but one must avoid extrapolating these intensive care results to standard preventive supplementation. In short, the evidence exists for this specific context, but it requires confirmation by larger-scale trials before being considered established medical practice.

the sources

1. 1NIH Office of Dietary Supplements 2026
2. 2Manson JE et al. 2019