German hospital staff face alarming vitamin D shortages compared to outdoor workers

A new study has revealed striking differences in vitamin D levels among hospital staff and outdoor workers in Germany. Researchers at the Universitätsklinikum Bonn (UKB) found that medical personnel often had lower levels than those working outside, with some groups facing severe shortages—especially in winter.

The study tracked vitamin D levels across different job roles at a German university hospital. Intensive care staff recorded the highest average at 43.6 nmol/L. Waste management workers followed closely, with an average of 41.7 nmol/L, though their results varied widely.

Surgical teams fared the worst, with half suffering from severe deficiency. Administrative staff also struggled, with only about one in four maintaining adequate levels. These disparities align with known risks for shift workers and indoor employees, who get less sunlight exposure. Seasonal changes played a major role. In February, the average level among hospital staff was just 40.02 nmol/L. By September, it climbed to 68.25 nmol/L. During summer, over 75% of staff had sufficient vitamin D, but this dropped to 25% in winter. The study highlights how endogenous vitamin D production relies on sunlight, making it vulnerable to latitude and seasonal shifts.

The findings confirm that vitamin D deficiency remains widespread among German adults, particularly in healthcare settings. Hospital workers, especially those in surgical or administrative roles, face higher risks than outdoor employees. Seasonal fluctuations further deepen the problem, with winter months exposing significant shortfalls in staff health.