calcium and diabetes

A study that tracked 80,000 women for 20 years says that calcium intake may lower the risk of diabetes. Results of the study:
Women who consumed the most calcium (more than 500 mg a day) from supplements had a 20 percent lower risk of diabetes than those who consumed the least (250 mg a day or less). Women who consumed the most vitamin D from supplements (more than 400 IU a day) had a 13 percent lower risk of diabetes than those who consumed the least (less than 100 IU a day).