> It's good to avoid fluoridated water as far as possible. Certain forms of bromine, including bromate and polybrominated biphenyls, are definitely toxic, but simple bromide isn't very toxic; it took large amounts of Bromo-Seltzer used for a long time to produce harmful effects, hundreds of milligrams per day. Seawater contains bromide, so all [[seafood]] contains a lot; [[milk]] and meat naturally contain it, because soil generally contains a moderate amount. A few of the promoters of large [[iodine]] [[supplements]]--Abraham, Flechas, and Brownstein--are giving a wrong impression of bromine. [(Reference)](https://archive.ph/o/OJZkW/https://raypeatforum.com/community/threads/ray-peat-email-advice-depository.1035/%23post-9815) > [Fluriode in showers] I don't think it's a problem. The soaps and shampoos people use are worse problems. Just washing the [[skin]] with pure soap alters the [[skin]]'s endocrine function for days. and doing it every day is an "endocrine disrupter," even if there are no toxic additives in the soap.