Optimal intestinal transit time is less than 24 hours, with 1 to 3 bowel movements per day. Transit time longer than 24 must be corrected or it favors the growth of intestinal dysbiosis (imbalanced intestinal flora such as yeast, parasites, and anaerobic bacteria). This condition can lead to intestinal symptoms, inflammatory bowel disease, auto-immune diseases, persistent yeast problems, and food allergies. Persistent prolonged transit time, with resultant stool retention and impaction, results in recycling toxins through the liver and circulation, causing increased risk of colon and other cancers as well as constipation. Therefore it is important to test transit time, even if you are having daily bowel movements.

To perform this procedure:

1. Make a note of date and time.
2. Take 10 capsules of activated charcoal
   1. Alternatively, can eat a food that is indigestible such as sweet corn or beets.
3. Make a note of date and time when bowel movement first shows gray or black color.
4. Make a note of date and time when bowel movement last shows gray or black color.
5. Count how many hours between taking capsules and last black bowel movement.
6. Notify your doctor at your next visit.
7. If transit time is longer than 24 hours, treatment is needed to correct.
8. Treatment can consist of:
   1. Increased fiber in diet, fiber supplements, vitamin C (see Vitamin C Flush), magnesium supplements, and flax seed oil.
   2. Persistent prolonged transit time with resultant stool retention and impaction requires colon hydrotherapy (colonics), either at home or with a colon hydrotherapist.