Gastritis Support Group
Gastritis is a medical term for inflammation of the lining of the stomach. It means that white blood cells move into the wall of the stomach as a response to some type of injury. Gastritis has many underlying causes, from infection with the bacterium H. pylori, bile reflux, or excessive consumption of alcohol or certain foods or drugs like aspirin.
I've flown out of LAX and been able to bring dry foods with me, no gluten for me. I can't remember if you can only bring food on board bought past the security check points. But an international flight might be different. Good luck.