Lack of vitamin D is associated with insulin resistance and beta cell dysfunction

The role of vitamin D in type 2 diabetes is well recognized, however, its relevance to glucose metabolism is not well studied. In a recent study of 126 healthy, glucose-tolerant subjects living in California, the role of vitamin D and glucose metabolism was analyzed. Subjects with low vitamin D levels had a greater prevalence of health risks associated with metabolic syndrome than did subjects whose vitamin D levels were in the normal range. The data showed a positive correlation of vitamin D concentration with insulin sensitivity and a negative effect of low vitamin D on beta cell function. The researchers concluded that those with poor vitamin D status are at a higher risk of developing insulin resistance, metabolic syndrome, and conceivably type 2 diabetes.