It certainly did for me + IBS goes away after just a week on it. Gas is passed once a week, if at all. It's hard to argue that my gut is extremely happy when eating an extremely restricted diet. Digestion is a non event.

And no, you don't _need_ fibre. I'm right in the middle of the Bristol stool scale with zero fibre. Another thing that scientists are uncovering right now but "you need fibre, fibre is good" keeps being parroted by everybody because someone said so 5 decades ago. Such is dogma.