RE Chron's.
Look into LECTINS. Work by Dr. Gundry. Forget the supplements and shit he sells (probably good, just expensive), read up on his "Lectin Diet". May be just the insight you need, worked for me (but not advanced issues).
>malk?
So there are 2 kinds, A1 and A2. Can make a big difference to Chron's folks, if malk drinkers.