@goniath, not exactly the same condition but I had chronic gastritis due to SIBO that went untreated for years and what I found helpful was goat’s milk and sipping a tea made from slippery elm bark and marshmallow root (what marshmallows were originally made from) before meals. All three are old remedies for ulcers. If your ulcer is due to H. pylori, goldenseal, a traditional herbal antibiotic, may help but you’ll want to cycle it because of its antimicrobial properties.
G