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.
When the colon's muscle contractions are slow or sluggish, the stool moves through the colon too slowly, resulting in too much water being absorbed. Some of the most common causes of constipation include the following: Medications. Lack of exercise. Not enough liquids. Not enough fiber in the diet. Irritable bowel syndrome
Conditions of the gastrointestinal tract that cause black stool. Black stool can be due to a variety of serious or life-threatening conditions that result in bleeding of the gastrointestinal tract including: Abdominal or esophageal trauma. Abnormal blood vessel. Bleeding esophageal varices (abnormally widened or distended blood vessels in the esophagus that rupture)