Yes, excessive foul-smelling gas is definitely a sign of parasites. I heard all my life that you could tell if an animal had worms because it would have terribly bad breath. Just think, if those worms are eating, they are also pooping...eck!
No, you don't take anything with the Humaworm, no colon cleanses, no liver flushes, nothing...just the Humaworm. It has all the cleansers you'll need.
I just finished my second round, and I am feeling much better than I did even after the first round. It takes awhile, but from what I've read people with severe symptoms usually feel much better after the second round of Humaworm.