Hello D,
The Mayo Clinic web site gives a good description of the low residue diet, reason for it, and foods to eat while on it. Go to http://www.mayoclinic.com/health/low-residue-diet/MY00745 to access this information.
Keep in mind, this is not a long term eating plan. It's typically used to give your gut a break for a certain period of time until your symptoms abate or stabilize. If you haven't already, you may want to consult with your doctor about the diet and its effectiveness for you.
Best of luck,
Elizabeth
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