To all those seeking to induce or acquire constipation on purpose
Direct quotes from Dr Norman Walker: "A state of constipation can exist when movements of the bowel seem to be normal [,,,] two or more bowel movements a day are not a guarantee that all is well [...]
Obviously if the faeces in the colon have putrefied and fermented, any nutritional elements present would pass into the blood stream as polluted products. What would otherwise be nutritional becomes, in fact, the gestation of toxaemia"
Early signs of fecal autointoxication - pimples, greasy skin, unexplained persistent nausea, headaches, irritability and irrational behavior etc
Mid-term signs - general health deteriorates, immune system afflicted
In the very long term - cancer
(sources for this info are too numerous to list)