Unfortunately each person reacts to different foods in a unique way. It may take some trial and error. What we do know is that introducing more fibrous foods into your diet quickly can often cause some digestive discomfort. If you are not used to eating a lot of plant-based foods (veggies, fruits, legumes, beans, nuts, and seeds), then introduce them slowly - maybe start with a small cup NutriBlast for a week, then slowly increase consumption of these foods outside of Blasting, then you may be ready for a tall cup by the next month. Continue to drink plenty of water between meals so that you do not become constipated.
Focus on anti-inflammatory foods:
Wash all produce before using it:
A couple other things you may want to consider and should ask your Dr. about are a probiotic, cooking some veggies if raw are too hard on your digestive system, avoiding dairy, and eating small frequent meals vs. a few larges ones. Using the NutriBullet and breaking down your food should help with nutrient absorption and digestion!
If you experience a flare up, you may want to cut back on the fibrous foods, then re-introduce them after it subsides. Also, avoiding foods that may cause gas could be beneficial: http://www.nutriliving.com/blog/feeling-bloated. To help determine your "trigger" foods, I'd recommend keeping a food diary and seeing if there are any foods you eat that cause a flare up.
Again, always check w/ your Dr. to make sure these recommendations are appropriate for you and if taking certain medications that there are no food/drug interactions.
For some inspiration, check out Jay's success story! http://www.nutriliving.com/blog/relief-colitis
Happy Blasting :)