10 Things You Need to Know About Your Thyroid

9. Fluoride, bromide, and chloride coming from your diet, fluoridated water, toothpaste, or other environmental exposures, can interfere with the iodine your thyroid needs to function. (7) If you are having a hard time regulating your thyroid function, even with medications and a supportive doc, look for sources of these in your life and try to reduce/eliminate exposure.