Intestinal transit time refers to how long it takes for food to move from the stomach to the anus after it has been broken down in the stomach. Rapid Intestinal Transit results in inadequate nutrient absorbtion.
The time taken for food to pass through the gastrointestinal
tract depends on various factors. It normally takes around 2.5 to 3 hours for 50% of stomach contents to empty into the intestines, and 4 to 5 hours for the stomach to empty completely. A 50% emptying of the small intestine
then takes another 2.5 to 3 hours, and the final stage – transit through the colon
– normally takes 16-40 hours. High-fiber diets generally result in lower transit times.
Causes and Development
Aside from those mentioned below, there are many other things that decrease the amount of time that stool stays in the intestines, including:
- surgical bypass of part of the intestine
- acidic foods
- stress and anxiety are also common causes
- Zollinger-Ellison syndrome (over-production of acid due to a tumor).
Signs and Symptoms
There is no "normal" color of stool because it varies from person to person and depends on what was consumed and the digestive process. As food moves through the digestive tract, it usually turns from green to yellow-orange to brown. Bile
are what gives stool its final brown color.
Rapid intestinal transit is often suspected when stool color is green(ish), meaning that the final stages of digestion have not had time to take place.