MissTreated,
you are correct, ketchup for example. The other thing you have to watch for is modified FOOD starch, modified corn starch is ok but food starch could be wheat.
When my husband was on the diet I realized that the ingredients on canned foods were not consistent, one time the food would be food starch & the next time the same food would have corn starch. It made for 2 hour grocery trips.
Anyone on this diet has my empathy.
Jo