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To the Editor: In their study, Dr Lang and colleagues¹ found that higher urinary concentrations of BPA were associated with diabetes. Based on animal studies, the authors had hypothesized that BPA exposure would be positively associated with type 2 diabetes. However, NHANES, the database used in this study, does not distinguish between type 1 and type 2 diabetes. Although it is likely that most of the participants with diabetes had type 2, it is probable that some of them had type 1.

The authors pointed out that BPA has been found to disrupt pancreatic β-cell function in animals; this may have implications for not only type 2 but also type 1 diabetes. Bisphenol A has also been found to disrupt thyroid hormone,² and people with type 1 diabetes have a 2 to 3 times higher risk of thyroid dysfunction than the general population.³ In some studies, type 1 diabetes has . . . [Full Text of this Article]

Sarah Howard, MS
sbg@umich.edu
East Greenbush, New York

Timothy G. Howard, PhD
The Nature Conservancy
Albany, New York

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