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.
1 Dark stool in children and Bleeding symptoms (6 causes). 2  Dark stool in children and Dark coloured stool in elderly (6 causes). 3  Dark stool in children and Dark stool (6 causes). 4  Dark stool in children and Sudden onset of dark coloured stools (6 causes).