Various types of potatoes. A staple food, or simply a staple, is a food that is eaten routinely and in such quantities that it constitutes a dominant portion of a standard diet for a given people, supplying a large fraction of energy needs and generally forming a significant proportion of the intake of other nutrients as well.
Constipation is defined medically as fewer than three stools per week and severe constipation as less than one stool per week. Constipation usually is caused by the slow movement of stool through the colon.
Harmless Causes Of Black Or Dark Stool. A black stool caused by food, supplements, medication, or minerals (but not blood) might be called false melena.. The stool might be black, but it doesn't actually contain any blood. Iron supplements, taken by many women to combat iron-deficient anemia, may cause stools to be black or even greenish in color.