Corn - not allowed

I was in a discussion about corn as related to the 4HB / Slow Carb diet. It seem that corn is not allowed on the diet. I was looking over the recipes I had submitted and found that I had been using/recommending corn. The consensus seems to be that if there is a small amount of corn like there is in most mixed veggie recipes, then you are probably okay. Full cans of corn should probably be avoided. Corn is a grain even if we normally eat is as a veggie. (Remember that a tomato is a fruit but is okay to eat on this diet).