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Bright orange specks may show up in your bowel movements, though this should not actually color your bowel movements orange. Dr. Paredez continues, âOrange diarrhea may be the result of infectious diarrhea, which causes rapid transit through the intestine, which limits the amount of bile in the stool. Bile duct cancer and pancreatic cancer are the life-threatening medical conditions that can result in orange diarrhea.
A black stool caused by food, supplements, medication, or minerals might sometimes be called false melena.. It is called false because the black color is not actually due to bleeding. Iron supplements, taken alone or as part of a multivitamin for iron-deficiency anemia, may cause black stools or even green stools. Foods that are dark blue, black or green may also cause black stools. Substances that are often found to cause black stools include: Black licorice. Blueberries. Iron supplements. Lead.