Thank you, Miss Callie - you saved me and lots of other people work in trying this themselves (assuming your results are typical). Your detailed trial posted here for all to see is the first concrete thing I've seen on a real person trying 5htp for constipation.
The various studies about 5htp somehow affecting serotonin in the gut never really did any consistent trial using it in people with slow motility (constipation/ gut motility problems). Your very specific evaluation is helpful in my decision whether to take the time to try it, versus instead trying other things on my "try this" list.