What can I eat just before a colonoscopy?

No soups as they frequently have solids or are not clear. When I had had mine, I was able to have a light breakfast the day before and then it was bullion, jello and clear drinks (non-carbonated). Nothing with orange, red or purple color as they contain red dye which can effect the color of the colon and make it appear inflamed. Nothing with pulp (orange juice, grapefruit juice, etc). No dairy products. A general rule of thumb is if you can't hold up the glass and see through the liquid, you can't drink it. I drank lots of fluids (apple juice, white grape juice, gatorade, etc). Plenty of jello was consumed as well as broth and/or bullion. I would avoid the beef bullion as it has specs of beef in it. Remember you are trying to clear your digestive tract; solids require digestion whereas a clear liquid can be absorbed. Also you are attempting to keep yourself hydrated because the laxatives (particularly PEG based laxatives) are osmotic and will be removing fluids from your body making your have loose movements.