Evidence from trials with vitamin D and /or calcium supplementation suggests that combined vitamin D and calcium supplementation may have a role in the prevention of type 2 DM only in population s at high risk ( i.e. glucose intolerance ) .
Vitamin D and calcium insufficiency may negatively influence glycemia , whereas combined supplementation with both nutrients may be beneficial in optimizing glucose metabolism
CONTEXT Altered vitamin D and calcium homeostasis may play a role in the development of type 2 diabetes mellitus ( type 2 DM ) .
Diet and risk of clinical diabetes in women.
To determine the relations of diet with risk of clinical noninsulin-dependent diabetes , we analyzed data from a prospect i ve cohort of 84360 US women . During 6 y of follow-up we identified 702 definite incident cases . Because body mass index ( BMI ) is a powerful risk factor for diabetes , we examined the relations of fat ( including type ) , fiber , sucrose , and other components of diet to risk of diabetes , among women with BMI s ( in kg/m2 ) less than 29 kg/m2 . After controlling for body mass index , previous weight change , and alcohol intake , we observed no associations between intakes of energy  , protein , sucrose ,  carbohydrate  ,  or fiber and risk of diabetes . Compared with women in the lowest quintile of energy-adjusted intake , and relative risks ( and tests for trend ) for those in the highest quintile were 0.61 ( P trend = 0.03 ) for vegetable fat , 0.62 ( P trend = 0.008 ) for potassium , 0.70 ( P trend = 0.005 ) for calcium , and 0.68 ( P trend = 0.02 ) for magnesium . These inverse associations were attenuated among obese women ( BMI s greater than or equal to 29 )
Evidence from trials with vitamin D and /or calcium supplementation suggests that combined vitamin D and calcium supplementation may have a role in the prevention of type 2 DM only in population s at high risk ( i.e. glucose intolerance ) .
Vitamin D and calcium insufficiency may negatively influence glycemia , whereas combined supplementation with both nutrients may be beneficial in optimizing glucose metabolism
CONTEXT Altered vitamin D and calcium homeostasis may play a role in the development of type 2 diabetes mellitus ( type 2 DM ) .