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The meta-analysis included data from eight observational cohort studies and 11 randomized controlled trials that involved diabetes and measuring vitamin D. The investigators, who were from Tufts Medical Center and Carney Hospital in Massachusetts, found that overall, individuals who consumed more than 500 International Units (IUs) per day of vitamin D had a 13 percent reduced risk of type 2 diabetes when compared with those who consumed less than 200 IU per day.
Although accurate and convenient for detecting type 2 diabetes and prediabetes in adults, current HbA1c cutoffs may not be enough to diagnose diabetes in children.
A 2010 clinical practice guideline from the American Diabetes Association recommends that physicians exclusively use the HbA1c assay to detect diabetes. The guidelines recommend a cutoff of 6.5% or greater for diagnosis.
However, researchers for two recent studies highlight significant vulnerabilities in the recommended test’s ability to diagnose diabetes and prediabetes in children.