I swear by L-glutamine. It really does work! I was accidentaly cross-contaminated awhile back but had been religious about taking the supplement and my recovery time was greatly reduced along with the symptoms. (even the irritability!) I would highly recommend taking it as a matter of course even after healing in case of accidental glutening or cross-contamination.
I actually take two supplements three times daily...and 3 months after i was diagnosed i was almost completely healed