Ya know what they say.
Most diets dont work.
I dont think they were only referring to the ones that are designed to help you lose weight.
I've read other forums where folks have restricted themselves to the point of near starvation, for conditions other than what you're referring to. But to the same conclusions.
They dont help.
Diets like the one you're probably referring to are designed to help AFTER you figure out what it is you're dealing with, not the other way around.
I dont know what kind of symptoms you're dealing with, but if I were a betting man I would bet that it aint what you think it is.