'One of the worst sources of fluoride is the Teflon we cook with. According to a study from 1975 published in the Journal of Dental Research, Teflon or non-stick cookware and bakeware increase the fluoride in your food by up to 3 times. (Source)
It’s hard to avoid exposure to Teflon when eating out, or eating processed, packaged foods, since Teflon is used in most restaurants and food processing. However, most of us eat at home the majority of the time, and when eating at home, you should avoid using Teflon for cooking.'