Posted 01 July 2014 - 04:02 PM
There is a direct correlation between protein and constipation.
There’s a strong link between opioid peptides from food and constipation. The worst foods seem to be wheat, meat and milk. I tried an Atkins type diet recently with mainly pork and veges and evacuation took 2 hours, when I had got it down to 1 hour. I don’t eat red meat but maybe all meat has a constipating property. The main point is that certain peptides in proteins have an antiperistaltic affect on the colon which slows down motility.
Yesterday evacuation took 15 minutes which is very fast. The previous day I had porridge for breakfast, some chips for lunch which caused a lot of gas as they’re very starchy and an omelette and a big bowl of cooked veges – potato, sweet potato, pumpkin & peas. I can’t say that evacuation was 100% complete as the gas started at midday but the quick evacuation was a nice surprise. I can’t find any studies on why certain foods cause constipation apart from this theory about opioid peptides. I’ve found that cooked low-FODMAP vegetables seem to be the best thing to eat and I try to fill up on these as much as possible. Out of the proteins, I think eggs and fish are the least constipating.
The opioid peptides include casomorphin from milk and gluten exorphin from wheat, rye and barley. I drink A2 milk which doesn’t have this. I only drink milk in tea and porridge.
I found other studies that suggested that all grains have opioid peptides. I know I have a particular problem with rice so don’t eat this anymore.
Dietary Proteins and Functional Gastrointestinal Disorders
Food derived peptides with biological activity
MU-OPIOID RECEPTORS AND DIETARY PROTEIN
STIMULATE A GUT-BRAIN CIRCUITRY
LIMITING FOOD INTAKE
Food opioids – addiction to constipation
(I posted this and provided a lot of interesting links)