That does make some sense (about things being gluten but not wheat, etc).
He did mention the other common ones (nuts, dairy, eggs), but I think suggested wheat as a starting point.
I can't remember if I realised allergens caused behavioural problems. Maybe I did.
That really is a help.
So, if I stay off wheat stuff, how long would it take for it to have an effect (or no effect, if that's not it)?