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:
According to Wikipedia, a gastrointestinal hemorrhage causes the stool to appear black because of â. . . oxidation of the iron in hemoglobin during its passage through the ileum and colon.â Black stool differs from bloody stool even though both conditions stem from internal bleeding.