A :B :C :D :E :F :G :H :I :J :K :L :M :N :O :P :Q :R :S :T :U :V :W :X :Y :Z :


Fluoride

A naturally-occurring constituent of some water supplies, an excess of which (over 2.0 ppm) can cause discolored teeth (mottling). Skeletal fluorosis, a serious crippling bone disorder resembling osteoporosis, can develop from many years of exposure to drinking water with more than 4.0 ppm of fluoride.