Vitamin D status may be related to the tendency to develop diabetes during pregnancy, according to a study published in the Journal of Obstetrics and Gynecologic and Neonatal Nursing (volume 41, Issue 3, pages 328–338, May/June 2012). This was a meta-analysis that looked at six studies performed between 1999 and 2011. Five of the studies
Research appearing in Diabetes Care (2012 Jul; 35(7): 1544-51) looked at two cohort studies, involving over 7,000 men and women. The subjects were free of type 2 diabetes and heart disease at the start of the study (one study started in 1982-83, the other in 1986-87). Selenium levels were measured in the toenail. Questionnaires were