A recent issue of Diabetes published the outcome of a study of middle-aged men and women that found lower serum vitamin D levels
are associated with an increased risk of developing insulin resistance and elevated blood sugar over a 10-year period.
Children with levels below 30 ng/ml had nearly twice the anemia risk of those with normal vitamin D levels
. Severe vitamin D deficiency is defined as vitamin D levels
at or below 20 ng/ml.
It was found that vitamin D levels
were consistently lower in children with low hemoglobin levels compared with their non-anemic counterparts.
Brown's team found a significant association between higher vitamin D levels
and a decreased risk of depressive symptoms, especially among those with a history of depression.
Low vitamin D levels
were found in women, the elderly, and obese individuals.
Serum 25-hydroxyvitamin D levels
and risk of multiple sclerosis.