EEN is a well-described and effective therapy for Crohn's. Used less in adults, and much less common in North America for whatever reason (awareness is probably kinda low). The trials establishing it happened back in the 1980s IIRC.
Decreasing microbes is posited as one of the possible mechanisms of action IIRC. See the CD-TREAT diet https://pubmed.ncbi.nlm.nih.gov/30550821/
And yeah the elemental formula I tried is https://www.integrativepro.com/products/physicians-elemental... but it's super expensive, tastes terrible, and studies don't show that it has better results than polymeric formula.
Ultimately ideally you only go through the bad phase once. If you can get into remission earlier you have a better chance of durable deep remission where your gut is totally repaired and your chance of the negative flywheel of wound -> bacteria leaking into bloodstream -> tnf inflammation -> bigger wound is minimal.
This is entirely unimportant, but I always really liked the taste of that one.