Has anyone heard an explanation why for the 50% of IBS people who are IBS-A, that it cycles from C to D? What causes it to cycle to D? If you go to a site like Heather Von Vorous, the group-think (no offense, very nice people!) is that it is some trigger food. FInd that one nasty food and you will finally stop cycling between C and D.But I eat the same foods every day. I have a very restricted diet yet cycle through periods of great calm (very mild C) to D, and I have yet found a reason why it happens. I am beginning to think it is phases of the moon, like being a werewolf. Has anyone read a medical explanation for why this happens? I just do not believe it is because we all just have not found that one trigger food, especially when we control our diets and eat the same food every day, while the cycles change like seasons of the weather around us.I have my hair highlighted golden blonde. Maybe it just takes about 4 weeks to get from my brain down to my intestines? That is about as sensible as some of the other theories I've heard that refer to sperm count and other bizarre things (e.g., moving to "D" signifies you had an alien abduction the night before...)