As further evidence how do the people who claim the intake of iodine causes acne through bromine displacement explain this simple fact? Both chlorine and fluorine are also halogens and also displace bromine in elevated levels. So why don't people break out from drinking tap water? Or swimming in pools or showering? Why don't they break out from ingesting foods processed with fluoridated water? Or from drinking tea which is loaded with fluoride? For that matter why don't people who use spas have major acne outbreaks as spas are brominated?