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.
Common Causes of Constipation. To understand how to prevent constipation, it helps to know what causes it. As food passes through your colon, your body absorbs the water from it, and what's left forms into stool. Your muscles move it through the colon to the rectum, where you pass it. When this movement slows down, your colon draws too much water. Stools get dry and hard to pass, causing constipation.