I realize this may be a foreign concept to some people, but there are various reasons why a person may have had their colon removed. Someone close to me has gone through this due to Ulcerative Colitis (similar to Crohn's disease). I also realize that not everyone may want to share this on a forum, but if you or someone you know is without colon and you'd like to share any experience or suggestions related to food and drink while backpacking please feel free to contribute.
For example, limiting or eliminating intake of nuts, seeds, and cellulose and increasing fluid intake is usually critical.
I don't have any suggestions for foods or supplements that would be of the most benefit for the colon-less but that's part of the reason I wanted to start the thread. Any and all suggestions are welcome, questions too. And, no, colon removal is not a UL trend :)