Sheryl Canter wrote:

> IBS is very much a physiological problem--it's just a different one from what
> you describe.  The peristalsys becomes spastic rather than smooth.  This can
> result in alternating constipation and diarrhea, or simply loose stools with
> undigested food in it.  Note that food is mainly broken down for absorption
> into the body in the small intestine--not the stomach.  Undigested food in
> the stool is more about the speed of bowel emptying than the speed of stomach
> emptying.
>

Another cause of undigested food in the stool is celiac disease, where the gluten

in wheat and other grains causes the loss of the villi in the small intestine,
resulting
in undigested food and a very quick transit time.  Some people think that gluten
is a cause of IBS as well, though there is a difference of opinion on it.  In
either
event, eating paleo and avoiding the grains restores health to the intestines.

    Lynnet