One of the chronic features associated with many disorders is
inflammation
levels.  Choice of foods, those to use and those to moderate help avoid
and/or reverse to some degree those disorders. Here are links to aid in
this decision:

Some foods help control and others tend to promote inflammation:

http://nutrition.about.com/od/dietsformedicaldisorders/a/antiinflamfood_2.htm

This one overlaps with the above and adds more examples of those to
choose
and has information about the role of inflammation in disorders and how
food choices affect them

http://www.metabolismadvice.com/

The above links were found in another support group, this one is the
source
of the latter and adds links to how exercise and weight loss can also
help:

http://www.metabolismadvice.com/anti_inflammatory_food