Vitamin D and Calcium Intake May Reduce the Risk of Type 2 Diabetes

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Vitamin D and Calcium Intake May Reduce the Risk of Type 2 Diabetes in

Women

“Vitamin D and calcium intake in relation to type 2 diabetes in women,”

Pittas AG, Dawson- B, et al, Diabetes Care, 2006; 29(3): 650-6.

(Address: Division of Endocrinology, Diabetes and Metabolism, Tufts-New

England Medical Center, 750 Washington Street #268, Boston, MA 02111,

USA. E-Mail: apittas@... ).

Summary: In a prospective study involving 83,779 women (Nurses’ Health

Study) with no history of diabetes, cardiovascular disease, or cancer at

baseline, results suggest that vitamin D and calcium intake have a

potential role to play in reducing the risk of type 2 diabetes. During

20 years of follow-up, vitamin D and calcium intake from diet and

supplementation was assessed every 2-4 years, and during this time

period, 4,843 incident cases of type 2 diabetes were documented. After

adjusting for potential confounders, the relative risk (RR) of type 2

diabetes was 0.87 in the highest versus the lowest category of vitamin D

intake from supplements, and 0.82 in the highest versus the lowest

category of calcium intake from supplements. While no association was

found between total vitamin D intake and type 2 diabetes, the

multivariate RR of type 2 diabetes was 0.79 in the highest category of

total calcium intake from all sources, compared to the lowest category.

Additionally, a combined daily intake of at least 1,200 mg calcium and

800 IU of vitamin D was associated with a 33% lower risk of type 2

diabetes (RR, 0.67) compared to a daily intake of at most 600 mg calcium

and 400 IU of vitamin D. Thus, this study suggests that intake of

vitamin D and calcium may play a beneficial role in reducing the risk of

type 2 diabetes in women.

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ne Holden, MS, RD < fivestar@... >

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