Feingold diet
The Feingold diet is an elimination diet initially devised by Benjamin Feingold following research in the 1970s that appeared to link food additives with hyperactivity; by eliminating these additives and various foods the diet was supposed to alleviate the condition.
Popular in its day, the diet has since been referred to as an "outmoded treatment"; there is no good evidence that it is effective, and it is difficult for people to follow.