SIBO — Questions & Answers

Small Intestinal Bacterial Overgrowth (SIBO) occurs when colonic bacteria migrate and proliferate in the small intestine, causing bloating, excess gas, diarrhoea, malabsorption, and nutritional deficiencies. It frequently underlies diagnosed IBS and chronic digestive symptoms that fail to improve with standard treatment approaches. Antibiotic courses like rifaximin can reduce bacterial load temporarily, but without correcting the root cause — impaired motility, low stomach acid, or anatomical factors — SIBO recurs in the majority of patients within months of completing treatment. Root-cause treatment includes elemental or low-FODMAP dietary protocols, prokinetic herbs to restore the migrating motor complex, and targeted antimicrobial botanicals alongside gut lining repair.

SIBO Full Form — What Is SIBO Disease?

SIBO full form is Small Intestinal Bacterial Overgrowth. SIBO is a condition where colonic bacteria migrate into and proliferate in the small intestine — a region that should be largely sterile. These bacteria ferment carbohydrates before they are absorbed, producing hydrogen or methane gas that causes severe bloating, belching, abdominal distension, and altered bowel habits. SIBO is one of the most underdiagnosed gut conditions in India and is the actual root cause behind many cases labelled as IBS, functional bloating, or unexplained digestive symptoms.

Symptoms of SIBO Disease — The Full List

SIBO symptoms vary depending on whether hydrogen or methane is the dominant gas produced:

• Hydrogen SIBO (IBS-D type): severe bloating and distension (worst 1–3 hours after eating), diarrhea, abdominal pain, nausea, belching
• Methane SIBO (IBS-C type): severe constipation, bloating, significant weight gain (methane increases calorie absorption), brain fog, fatigue
• Common to both: nutrient deficiencies (B12, iron, fat-soluble vitamins), food intolerances that worsen over time, skin problems, anxiety

SIBO is diagnosed with a hydrogen-methane breath test — a simple, non-invasive test involving drinking a sugar solution and measuring exhaled gases over 2–3 hours.

Diet for SIBO — What to Eat and Avoid

The SIBO diet reduces fermentable carbohydrates that feed overgrown bacteria in the small intestine:

• High-FODMAP foods to reduce: onion, garlic, wheat, beans, lactose, apples, excess sugar — all ferment rapidly in SIBO
• SIBO-safe Indian foods: plain rice, well-cooked carrots and zucchini, plain curd (small amounts), banana, eggs, chicken, fish
• Important caution: isabgol and high-fibre supplements typically worsen SIBO bloating significantly — avoid until SIBO is cleared

SIBO Natural Remedies — How to Cure SIBO

SIBO natural remedies work by targeting the overgrown bacteria without destroying the colonic microbiome the way antibiotics do. The best-studied herbal antimicrobials for SIBO:

• Neem and oregano oil — broad-spectrum antimicrobials effective against SIBO bacteria
• Berberine (from Daruharidra) — strong evidence for both hydrogen and methane SIBO
• Ginger — prokinetic; stimulates the migrating motor complex (the gut's self-cleaning wave) that prevents SIBO recurrence

Antibiotic treatment (rifaximin) is the standard cure for SIBO but has a 40%+ recurrence rate without addressing why SIBO developed — low stomach acid, impaired motility, or PPI use.

The AYUSH Approach to SIBO

At Thavira, SIBO treatment uses a 4-week herbal eradication phase (neem, berberine, oregano) followed by a 6-week motility restoration and microbiome rebuilding phase with Trikatu and prokinetic herbs — the combination that prevents recurrence. SIBO testing is available and recommended before starting treatment, because dietary changes without clearing the overgrowth produce only partial relief.