This study by various U.S. research institutes aimed to find out whether vitamin D supplementation affects the risk of diabetes. The study included 2,158 participants with prediabetes (elevated blood sugar levels that fall below the threshold to diagnose diabetes) who were assigned to either a vitamin D group (1,074 individuals) or a placebo group (1,084 individuals). Participants in the vitamin D group took 100 µg (4,000 units) of vitamin D3 daily. Conclusion: A daily vitamin D supplementation that ensures a serum 25(OH)D level of ≥100 nmol/L is a promising approach to reducing diabetes risk in adults with prediabetes. For more information, see the study.
Dawson-Hughes et al.