I am also prone to stomach ulcers. I have had 3 in the past 10 years. I read there is a certain bacteria in the stomach that leads to developing stomach ulcers. Due to a recent family dispute, the heartburn and stomach pain was constant. Shortly before I started taking HP, I read about L-Glutamine. I have been taking 500 mg three times a day, (with meals). It has stopped my ulcer pain almost 100%. I later read that it is helpful in protecting the stomach lining. I hope this helps you.