I think anyone with a severe diet issue should try a proper elimination diet with carefully documented reintroduction at least once, also taking into account things like food storage times (affects histamines) and processing (affects FODMAPs).
For me at least, symptoms follow about three days after I consumed the thing in question (in the form of inflammation rising and me getting severely sick), and I need to eliminate for a while for it to quiet down, and the quantity and context matter. Until I went on an elimination diet, it seemed completely random and impossible to make sense of, because too much was varying all at once, and I never actually felt okay. I also grouped together a bunch of things that were importantly different. (E.g. whether I tolerate soy depends on how it was processed. Whether I tolerate fructose depends on whether it is paired with glucose. Etc.) There were symptoms I was barely even aware of because I had never been without long enough for them to fade.
I think anyone with a severe diet issue should try a proper elimination diet with carefully documented reintroduction at least once, also taking into account things like food storage times (affects histamines) and processing (affects FODMAPs).
For me at least, symptoms follow about three days after I consumed the thing in question (in the form of inflammation rising and me getting severely sick), and I need to eliminate for a while for it to quiet down, and the quantity and context matter. Until I went on an elimination diet, it seemed completely random and impossible to make sense of, because too much was varying all at once, and I never actually felt okay. I also grouped together a bunch of things that were importantly different. (E.g. whether I tolerate soy depends on how it was processed. Whether I tolerate fructose depends on whether it is paired with glucose. Etc.) There were symptoms I was barely even aware of because I had never been without long enough for them to fade.