Intestinal disorders that cause a green-colored stool include irritable bowel syndrome, celiac disease, ulcerative colitis, Crohn?s disease and malabsorption, according to About.com. However, a green-colored stool is generally not a sign of an intestinal disorder, according to Mayo Clinic.
A green stool occurs due to food moving too quickly through the large intestine, explains Mayo Clinic. Other factors that cause a green stool include the consumption of green leafy vegetables, iron supplements or green food coloring.
Other possible causes of a green stool include infectious diarrhea, food poisoning, alcohol consumption, laxatives and cancer, according to About.com. If the green stool is not explained by dietary causes, supplements or medication, it is advisable to visit a medical professional.