My dad was diagnosed non erosive gastritis by an endoscopy yesterday. I always though non erosive gastritis is not serious, since it doesn't sound serious. I mean, erosive sounds more serious to me. The Doc. said non erosive gastritis is a general terms for several conditions, from the slight one with gastritis only on the surface, and the serious one, atrophic gastritis, which is close to a precancerous condition. My dad got the serious one, so he has to take prescription. The Doc said diet means little in this treatment. I hope this information can be helpful to you.