i wondered that myself. i think the stuff would gradually be passed on its own, but its hard to say. flushing it out is the way to go because you get rid of it right away.
im not sure about the bloating, as long as you are taking it on a completely empty stomach and not eating within 1/2 hour of taking it...other then that im not sure what would cause that. if it persists id suggest emailing them at sensiblehealth.com about it, they are very helpful at that site.