nerve damage - can't be or I wouldn't poop with carb diet
excessive iron consumption - nope,
lack of bile output - possibly
Please, I know all the possible reasons. Throwing a list at me isn't helpful. I've gone thorugh all this already. I have experimented and kept all other variables under control. It's the low carbs and thereason is most likely mitochondrial dysfunction which I do have according to tests at Acumen in the UK
The list was more for other people reading the post since I don't want people thinking that there is only a couple of causes of constipation. When people make assumptions like this they often misdiagnose themselves by only looking at a symptom or two and a cause or two. For example, a lot of people self diagnose with Candida overgrowth based on a white tongue coating since they read this is a symptom. But bacterial coatings can also cause a white tongue coating and is much more common.