I have had two colonoscopies.
none of them has shown MP. However, I passed an incredible ammount of it during colon cleanse.
I was wondering about that and I found that colonoscopies just reach the sigmoid. MP is mostly in the ascendent colon and the transversal colon, places the colonoscopy cannot reach.
The MP is not made with bentonite. My MP was hard as a tire. The very hard consistency and the dark color of it showed me that it was not PB . Additionally I passed MP while taking probiotics and medicine for cough. I was surprised, but I learned that medicine for cough dissolve mucus. I was not taking PB shakes at the time.