On Fri, 07 Sep 2007 13:20:09 -0000, Farrel > wrote:

>
>Do you have a reference? Where can I read more
>

The OP mentioned a study being done by the University of Pittsburgh,
so it may be this one:
http://www.pitt.edu/utimes/issues/28/91495/24.html

"Research finds no evidence that chocolate triggers migraines

Chocoholics take heart. A study being conducted by the headache clinic
of the University of Pittsburgh Medical Center's Pain Evaluation and
Treatment Institute has not turned up any evidence that chocolate is a
trigger for migraine or tension headaches in most people..." (more at
the link)


There's also this link, which contains much of the same content as the
OP:
http://www.relieve-migraine-headache...-headache.html