Or, click Cancel to remain on the current site. Please note, on the next page, only the information in the yellow box applies to DSM employees -- complete the information required. For questions on the Comparison Tool, contact Horizon Blue Cross Blue Shield at 1-800-722-2583. SHBP/SEHBP Home.
Green: 1  Green stools are always normal, but they can be mistaken for black stools. 2  Bile. Most dark green stools are caused by bile. 3  Green stools are more common in formula fed than breastfed infants. It can be normal with both.  Green stools are more common with diarrhea. This is due to a fast transit time through the gut.
False MelanaA black stool caused by food, supplements, medication, or minerals is known as false melena.. Iron supplements, taken alone or as part of a multivitamin for iron-deficient anemia, may cause stools to be black or even greenish in color. Foods that are dark blue or black in color may also cause black stools. Substances that can cause false melena are: