SUPER important!!! Yes that's a great point that we address in other articles and is worth mentioning many times over. Thanks for bringing it up here @amariespeaks~
Iodine, fluorine, and chlorine are halogens that compete for iodine receptor sites in the body. With enough iodine in the system, it's not too big a deal to be exposed to the harmful halogens in reasonable quantities - but #1 almost no one has enough iodine in the system anymore, and #2 it seems we are increasingly exposed to more and more toxins every day!
All the more reason to supplement with plenty of iodine from high quality sources.