< I don't know about this. Intolerance to certain foods can be sub clinical.
The
> body can fight its effects for many years before immune diseases strike
and
> many other syndromes for which there is no known cause.>

a fair comment.  These 'below the radar' insidious food reactions are
probably much
worse in the end, since you can't tie them specifically to one food with any
certainty.

andrew