This study, conducted by scientists from a research institute in Auckland, New Zealand, aimed to investigate the effect of improved vitamin D levels on characteristics of diabetes, like insulin resistance. The patients were administered 100 µg (4000 IU) of vitamin D3 (42 women) or a placebo (39 women) daily for 6 months. Supplementation with vitamin D resulted in significantly improved vitamin D levels and diabetes type 2 characteristics (e.g., insulin sensitivity and insulin resistance) compared with patients in the placebo group. These results indicate that improved vitamin D levels have beneficial effects on diabetes-related characteristics in these patients and provide evidence for an increase in the recommended adequate vitamin D levels. More details can be found in the study.
von Hurst, Stonehouse, Coad