Eating food lacking fiber greatly reduces the volume of the chyme and slows peristalsis. But moving through fast or slow, the colon still keeps on doing another of its jobs, which is to transfer the water in the chime back into the bloodstream, reducing dehydration. So the longer chime remains in the colon, the dryer and harder and stickier it gets. That's why once arrived at the "end of the tracks" fecal matter should be evacuated in a timely manner before it gets to dry and too hard to be moved easily. Some constipated people do have a bowel movement every day but are evacuating the meal eaten many days or even a week previously. Most hygienists believe that when the colon becomes lined with hardened fecal matter it is permanently and by the very definition of the word itself, constipated. This type of constipation is not perceived as an uncomfortable or overly full feeling or a desire to have a bowel movement that won't pass. But it has insidious effects. Usually constipation delays transit time, increasing the adsorption of toxins generated from misdigestion of food; by coating and locking up significant portions of colon it also reduces the adsorption of certain minerals and electrolytes. Sometimes, extremely constipated people have almost constant runny bowels because the colon has become so thickly and impenetrably lined with old fecal matter that it no longer removes much moisture. This condition is often misinterpreted as diarrhea. The large intestine's most important task is to transfer water-soluble minerals from digested food to the blood. When a significant part of the colon's surface becomes coated with impermeable dried rigid fecal matter or mucus it can no longer assimilate effectively and the body begins to experience partial mineral starvation in the presence of plenty. It is my observation from dozens of cases that when the colon has been effectively cleansed the person has a tendency to gain weight while eating amounts of food that before only maintained body weight, while people who could not gain weight or who were wasting away despite eating heavily begin to gain. And problems like soft fingernails, bone loss around teeth or porous bones tend to improve. The Development Of My Own Constipation The history of my own constipation, though it especially relates to a very rustic childhood, is typical of many people. I was also raised on a very constipating diet which consisted largely of processed cheese and crackers. Mine was accelerated by shyness, amplified by lack of comfortable facilities.