1 The Glossary of Education Reform by Great Schools Partnership is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. 2  Recommended APA Citation Format Example: Hidden curriculum (2014, August 26). In S. Abbott (Ed.), The glossary of education reform.
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:
Iron tablets invariably affect stools. Some level of color change in the stool is normal, but there are certain variations in feces that are cause for alarm. If you are concerned about any changes to your stool color, consult your doctor immediately.