Halogens

The article identifies iodine as an essential nutrient for thyroid hormone synthesis. Iodine belongs to the halogen chemical family, which also includes fluoride, chloride, and bromide. The article says halogens have similar molecular arrangements and can displace one another in the body. Fluoride and bromide compete with iodine for the same receptor sites, displacing iodine and reducing its bioavailability. The article classifies fluoride, chlorine, and bromine as neurotoxins without known essential metabolic functions. Modern exposure to fluoride, bromide, and chloride is substantial enough that even modest iodine intake may be insufficient. Fluoride belongs to the halogen family with chlorine, bromine, and iodine.