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Gastritis refers to acute or chronic inflammation of the gastric mucosa.  It is a condition caused by a variety of conditions of the gastrointestinal tract.  Food allergies, gut pathogens, bacterial overgrowth and poor digestion are all commons causes.  Once gastritis is present, we find most patients become sensitive to many foods with bloating, fatigue, skin conditions and stomach pains being common symptoms.    


Gastritis may be caused by a number of underlying disorders.

  • Acute causes
  • Excessive alcohol consumption
  • NSAID use
  • Post-surgery
  • Severe infection
  • Chronic causes
  • Bacterial infection, especially Helicobacter pylori
  • Other bacterial infections or the gut, parasites, insufficient healthy gut flora
  • Prolonged excessive alcohol consumption
  • Prolonged tobacco smoking
  • Food allergies and intolerances
  • Chronic bile reflux
  • Stress
  • Auto-immune disorders
  • Use of medications e.g. NSAIDs, aspirin
  • History of pernicious anaemia or gastric lymphoma

Signs & symptoms of Gastritis

  • Central abdominal pain: most common
  • Indigestion, belching
  • Loss of appetite
  • Nausea, vomiting
  • Feeling of fullness or bloating in upper abdomen

Differential diagnosis

  • Non-ulcerative dyspepsia
  • Peptic ulcer
  • GERD
  • Gastric cancer
  • Gastroenteritis
  • Coeliac disease
  • Pancreatic disease


  • Advanced stool analysis
  • H.pylori test
  • SIBO Breath test
  • Endoscopy if required
  • Intestinal permeability


  • Identify/address underlying cause (e.g. Gut dysbiosis, bacterial infections or parasites, NSAID use etc.)
  • Reduce pain and inflammation
  • Treat infection if indicated (e.g. Helicobacter pylori)
  • Repair gastric mucosa

Diet plan guidelines for Gastritis

  • Avoid food triggers: alcohol, sugar, coffee, spicy foods, acidic foods, nitrates, salty foods
  • Eliminate any known or suspected food allergens
  • Avoid overeating or eating too fast
  • Increase fibre intake, especially soluble fibre  
  • Cabbage juice, cabbage soup or sauerkraut: reparative to gut
  • Coconut oil: reparative to gut
  • Increase intake of sulphur-containing foods e.g. garlic, onion, brassica vegetables

Supplements that support Gastritis

  • Slippery elm: Helps soothe and repair stomach mucosa
  • Glutamine repair gut lining
  • Probiotics – can exacerbate symptoms where bacterial overgrowth is present
  • Zinc: enhance gut repair
  • Omega-3 EFAs: reduce inflammation
  • Curcumin: reduce inflammation
  • Vitamin B12 may be indicated in patients with pernicious anaemia or with H.pylori infection

Herbal medicine treatment that supports Gastritis

  • Demulcents: licorice, marshmallow, slippery elm
  • Antimicrobials: barberry, goldenseal, oregano, cinnamon, thyme
  • Repair gastric mucosa: calendula, goldenseal


Gastritis is a side effect of an underlying condition that requires treatment. 

Poor digestive function, SIBO, bacterial overgrowth of the digestive tract and parasites and bacterial infections are the most common underlying pathological reasons for gastritis. 

A functional medicine approach treats these underlying dysfunctions and allows the digestive system to repair, improving motility, absorption and overall digestive function.  This results in gastritis symptoms resolving without the continued use of proton pump inhibitors (PPI’s) or other acid neutralising medications that can have long term side effects.

At our Perth clinic of Advanced Functional Medicine we have experience with gastritis and other digestive disorders. 

If you or a family member require assistance with gastritis or other digestive disorder we would love to hear from you.  What are your main triggers foods?  Are you taking medications to control your symptoms, if so, what type?  Please write a comment below.

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The above information is intended to be general, educational advice only, on topics which are of interest to us. It is not intended to represent specific or individual health or medical advice and is not specific to your situation. The below information is educative and is not intended to advertise any service.

Before making any decisions in relation to your health, you should always discuss your individual situation with your own health practitioners to ensure that any advice you have read is right for you.

Jarrod Cooper – ND

Jarrod Cooper – ND

Jarrod Cooper - ND is the founder of Advanced Functional Medicine Australia. He is a Naturopathic Doctor with extensive functional medicine training from leading practitioners in the USA and worldwide.

He is leading the way with advancements of functional medicine, clinically implementing worldwide best practices in Functional Medicine throughout Australia.

Jarrod consults in person from Perth, Western Australia and also online via Telehealth throughout Australia and worldwide.

If you are looking for personalised treatment, we highly recommend contacting Jarrod Cooper’s Advanced Functional Medicine clinic in Australia.

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