Odd question to ask, right? Well, not so odd if you knew about the connection between the chemicals in your carpet and it's impact on your thyroid function. There are, unfortunately a number of things that impact thyroid function. Some examples include raw cabbage, broccoli and cauliflower, soy products, your teflon pans and chemicals from a number of sources, particularly your carpet and furniture. Below is an article by Jennifer Thomas of HealthDay News. Very informational to help you keep your thyroid healthy. In the article she talks about perfluorinated chemicals which are in the halide family. Halides displace iodine usage in the thyroid because they get integrated into the making of the thyroid hormone because they are chemically similar to iodine. Iodine is the primary element integrated in the thyroid hormone. Additionally these same chemicals affect iodine/iodide receptors in your body like the breast, prostate and uterus. Fibrocystic breast disease can be affected by these same chemicals as do other hormonally active disease that are affected by iodine usage.