Coordinator of CHE’s Diabetes-Obesity Spectrum Working Group
In a recent review, published in the leading diabetes journal Diabetologia, Hectors et al. (2011) describe how numerous environmental chemicals affect the insulin-producing beta cells of the pancreas. These effects, the authors argue, may be significant in the development of type 2 diabetes. Chemicals like bisphenol A, PCBs, dioxin, organophosphorous pesticides, arsenic, heavy metals, and others, can all affect how the beta cells function, and can interfere with their capacity to secrete insulin.
In type 2 diabetes, both insulin resistance—the body’s inability to respond correctly to insulin—and beta cell malfunction contribute to the disease. The inability of the beta cells to produce enough insulin leads to high blood glucose levels, and eventually diabetes (in many people with type 2, insulin production is higher than normal, to compensate for the insulin resistance—but it is still inadequate to bring blood glucose under control).