Anyone still on this thread. Unfortunately I still have the "brain fog" from when I did my final degree exams back in 1975. Have never got to to the cause or cure. Lately I am suspecting that my immune system was damaged by excessive oxytetracyclene (for acne) followed by a viral infection and stress (exams). So I think I have high levels of toxins, as happens with ME/CSF sufferers, and this is the reason for my symtoms. Who knows though .... doctor at the time gave me Librium!!!