Researchers analysed data from the Nurses Health Study, which includes over 83,000 women, to study the relationship of calcium and vitamin D intake to type-2 diabetes.

The conclustion after 20 years of follow-up, was that a combined daily intake of over 1,200 mg of calcium and more than 800 IU of vitamin D was associated with a 33 percent lower risk of type-2 diabetes. Interestingly, dietary vitamin D intake did not appear to provide any statistically significant benefit. It was noted that the women who supplemented with at least 400 IU of vitamin D had a 13% lower risk of diabetes when compared to those who took less than 100 IU per day. Both dietary and supplemental calcium resulted in decreased risk of type-2 diabetes, and those with overall intakes above 1,200 mg had a 21% lower risk than those who got less than 600 mg per day.

Elevated intakes of vitamin D and calcium, especially from supplements, are significantly associated with lower incidence of type-2 diabetes.

Article Source: Diabetes Care 29:650-656, 2006.

Click the link below if you would like more information on the top nutritional
supplements available (an independent study found them to be the no. 1 product)

Information on quality supplements here