Vitamin D and type 2 diabetes: a systematic review
The aim of this review was to examine the association between vitamin D status and the incidence of type 2 diabetes. A total of 19 studies was included. This analysis showed that individuals with the highest vitamin D status (>25 ng/ml) had a 43% lower risk of developing diabetes. Further details can be found in the study.
Mitri J, Muraru MD, Pittas AG. Vitamin D and type 2 diabetes: a systematic review. Eur J Clin Nutr. 2011 Sep;65(9):1005-15.