Stuff I don't eat/drink

Occasionally, an exception is made, but these are the things I try to avoid:

soda, diet soda
gum
white potatoes
pasta
bread
sugar
cottage cheese
foods containing bifidus
artificial sweeteners
artificial colors
artificial flavors
chocolate
corn
rice
couscous/ other grains
cornstarch
flour
baking powder

grapefruit (yuck)