Calcium and vitamin D may protect against diabetes

Increased intakes of calcium and vitamin D may improve insulin levels, and offer protection against diabetes, independent of dairy intake, suggests a new study. Writing in the Journal of Nutrition, Tianying Wu, Walter C. Willett, and Edward Giovannucci from Harvard School of Public Health report that women with high intakes of calcium had 20 per cent lower levels of C-peptide, a marker of insulin levels, while men with high vitamin D levels had similarly lower levels of the marker. “The results suggest that calcium intake or systemic vitamin D status, after adjustment for intake of dairy products, is associated with decreased insulin secretion,” they wrote.
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