I was diagnosed with Collagenous Gastritis.2 years ago. I was having severe stomach pain and I was anemic. I have had multiple test (scoped twice, MRI. swallowed a camera, blood tests, etc.) I was treated with Prevacid and iron supplements which greatly helped. After a year I switched from Prevacid to Zantac. It worked for a while, but my stomach pains have recently returned. I closely watch what I eat. I have noticed it is worse with processed foods and gluten. I am always searching for ways to keep it under control. My GI doctor recently moved out of state and I am now searching for one in the St. Louis area with experience in this. Thank you!