Well the desire is noble, and it's great you're helping your gf, but to try to put the desire to reverse the "trigger" into perspective, think of it this way: As far as science is aware thus far, what you're proposing would be akin to a wick on a candle which gets lit (the Crohns is "activated" and symptoms/flaring shows), and then to reverse it, a method of treatment (or rather a "cure") would essentially blow out the flame. As far as science understands the beast that is Crohns (btw, one quick tip, it's "Crohns" not "Chrons", I wish it was named after the common spellings in English for simplicity's sake, but it's named after an American scientist with German heritage from the early 1930's who documented the disease with colleagues
) is dormant in the genes, and when it's "lit" or "turned on" it's more akin to say, a rubberband, that snaps at one point, and science would love to re-fuse the two ends back together, but so far that's on paper and not reality.
A flare up that goes into remission is akin to taping that rubberband back together, but that remission can relapse and go flaring again if that tape is destroyed or stressed too much. Our goal is to retain that rubberband in it's taped status as long and strongly as possible, which is the goal of most medications and treatments. Science is working on a method to find out whose "rubberband can/will break" ie: who has Crohns in their genes but hasn't had their rubber snap yet....and I'm sure there are those who are searching for a way to fuse that rubber back so it's back reunited for good....that'd be the cure to Crohns.
I just came up with this analogy, so if any members want to elaborate on it, you're welcome, I hope I simplified the essence of the disease plainly for all to grasp, but since it was generated in 15 minutes, it could have holes in it....??