Lees de Nederlandse versie van dit artikel The normal color of a bowel movement is any shade of brown (usually medium brown), or brown/green. When yellow/pale stool appears, and there is no obvious reason due to consumed food, there might be anyone of the following disorders: Diarrhea : Diarrhea is the most common reason in changing the color of stool. The main difference in diarrhea and normal digestion process is that in diarrhea food passes through intestine so rapidly that intestinal bacteria do not have enough time for converting bilirubin into stercobilin that presents stool it's normal brown color . Gastro-esophageal reflux disease (GERD) is also a disease in which food is rapidly passed through intestines with digestion process. Cholestasis: In this disease bile flow from the liver into intestine is decreased or stopped. Due to the lack of bile, stools are light-colored. Undigested food particles may come out in stool. In cholestasis , bilirubin, and bile sa