To further clarify about kosher designations, the Ou stands for the
Orthodox Union which is the largest organization providing kosher
supervison in the country.  There are other organizations that provide
supervision to companies for their products so frequently you will see a
K  (less reliable that the OU)  or what we call the "kof" K, a hebrew
letter with a K in the center. There are many others, some are
considered acceptable by the strictest Jews while other are not, it all
depends.  The D will always mean that either dairy is in it or that
dairy equipment is used.

I learned a few years ago at A FAN conference that anything that
constitutes under two percent of a product does not by law have to be
listed on the label.  They called it the "two percent" rule and  I
basically always assume that any given item can be a problem at any
time,  There are products that seem to be always safe but it is always
safest to not eat alot of processed foods, particularily if your family
has alot of food issues like we do.

Larissa