We need sugar (via fruits and veggies, not refined) in order to keep our glucose levels in check or we'd die.
You don't need much though. The "Life without Bread" author (I forget his name) says that the optimal number of carbs to have a day is 78 grams. I know a couple people on the BTVC list who say they feel best with less than 50 grams. I think they stick to the low carb fruits and veggies like avocado, berries, and broccoli.
34 years old, Crohn's disease for 15 of them
Current Meds: Humira since 7/08, Pentasa, Effexor XR
Supplements: 3 kinds of Fish Oil, Multi-Vitamin, B-Complex, Vitamins D, E, & K, Calcium, Magnesium, Enzymes
SCD since 12/01/08 - eating Stage 3 foods