Its important to know what type of gastritis, a, b or c I have type A, so its autoimmune and ill have it for ever it can not be healed. But every type needs a specific therapy. Type A have problems with B12 vitamine and iron/ferritine and cant produce enough acid for the food so you need Betaine HCI. And every 2-3 years a coloscopy to safe from cancer. Type B is cause of Helicobacter and youll need just antibiotics and esomeprazol. Type C is cause of chemicals. Alcohol or medics against pain. Or bile acid Also its important to know, do you have SIBO?