I had a lot of trouble with sodium nitrite causing my symptoms to flare for over a year. This is a food additive that's in the news finally that is used to preserve almost all processed meats. It's a deadly poison in small quantities but it flushed out rapidly before it can accumulate. You can actually eat enough in a day it would be fatal if taken all at once.

Diet seems to be very important to me but needs and interactions just seem to keep changing.