Limiting BPA Exposure

Question: How can I minimize my exposure to phthalates and bisphenol A (BPA), the chemicals in plastics? Dr. Brownstein's Answer: Researchers studied 1,346 adults and 329 adolescents who participated in the National Health and Nutrition Examination Survey in 2007-2008 to measure the subjects’ exposure to phthalates and bisphenol A (BPA). Among the adults, there was an inverse relationship between phthalates (a chemical compound found in plastics) and thyroid hormone levels. In other words, the higher the phthalate level the lower the thyroid hormone levels (both T3 and T4). Higher levels of BPA (an organic compound that has weak, hormone-like properties) were also associated with lower hormone levels (T4 and thyroid stimulating hormone). The authors concluded: “These results support previous reports of associations between phthalates — and possibly BPA — and altered thyroid hormone levels.” Phthalates and BPA are found in plastic bottles and other food packaging; these chemicals affect the majority of Americans. Studies have correlated exposure to thyroid dysfunction, abnormal brain development, and weight gain. In addition to causing thyroid illnesses, these toxic agents are probably part of the underlying cause of the epidemic of hormone-sensitive cancers such as breast, uterine, and prostate cancer. Avoiding beverages in plastic containers can minimize exposure to BPA and phthalates. Ensuring adequate hydration and maintaining a daily exercise regimen that includes perspiration can help the body’s detoxification system excrete toxins.