Raising Low Vitamin D Levels Does Not Improve Glucose Tolerance

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Added information about and link to study published in the journal Nutrition where glucose tolerance was studied before and after people deficient in Vitamin D were given a large infusion of the vitamin sufficent to raise their levels to normal. No change in glucose tolerance or insulin sensitivity was demonstrated.

This raises the question of whether Vitamin D deficiency is a byproduct of the diabetic state rather than a cause of abnormal glucose metabolism or insulin resistance.