I just Googled Barretts esophagus to find out what is was. They keep coming up with new dis-eases every day. Do you also have GERD? If so I would respectfully suggest that your stomach may be "UP", meaning a portion of it is occupying a space it was never intended to occupy. When the stomach is extremely "up" a portion of it can perforate the hiatus where the esophagus and trachea go through to the chest, causing all manner of symptoms. The doctors call this acid reflux disease, hiatal hernia and a host of other diseases and treat it with immodium, alka seltzer and the like because in this position, the stomach is producing way more acid than usual. In this place, the stomach is also impeding the function of the left lung and heart and if untreated long term can cause dis-eases in these organs. you can get an alternative read about this condition at http://www.energybalancing.com/selfeval/stomachup.html
To cut to the chase, I would think logically that oral spray inhalation of H2O2 (Hydrogen-Peroxid) would benefit your condition since the cells have mutated for some reason or another.
If you eat peanut butter at all,you gotta be careful what brands you choose. They are definitely not created equal.
Best of good research to you!