Eating a low fiber diet will reduce intestinal constipation.
You can read much of it on his website called "Gut Sense.org"
"Fiber Menace" by Konstantin Monastyrsky
The Truth About the Leading Role of Fiber in Diet Failure, Constipation, Hemorrhoids,
Irritable Bowel Syndrome, Ulcerative Colitis, Crohn's Disease, and Colon Cancer.