>> Well I just had a most distressing experience. I had half a cup of
>> Haagan Dazs last night, for the first time in months, and almost
>> immediately felt the intestinal churn...

Had a similar experience recently.  I got hungry while running errands and
bought a dried fruit bar in the bookstore.  The costly little bar had sugar
in it, but I thought I could handle a little sugar.  Ha!

In about an hour, I became very, very nauseous and uncomfortable.  The
discomfort continued for about three hours.  I had not had sugar for a long
time and it will be a REALLY long time before I have it again.
Kath