Gut Testing — Questions & Answers

Gut testing — stool microbiome analysis, breath tests for SIBO, H. pylori stool antigen tests, and intestinal permeability markers — provides objective data to identify the root causes driving chronic digestive symptoms rather than relying on symptom-based diagnosis alone. Empirical treatment without testing often leads to repeated antibiotic courses, unnecessary dietary restrictions, or misdiagnosis of conditions like IBS that actually mask an underlying SIBO or H. pylori infection requiring specific targeted treatment. At Thavira Health, functional gut testing drives a personalised treatment plan targeting your specific microbiome imbalances, inflammatory markers, and digestive dysfunctions — removing the guesswork and delivering measurably faster, more reliable results.

Which Gut Tests Are Worth Doing?

Gut testing in India ranges from essential to expensive-but-useless. The tests worth doing are those that change treatment decisions. The most clinically valuable gut tests — ordered at Thavira before designing every treatment protocol:

• H. pylori stool antigen test — the most accurate non-invasive test for active infection; more reliable than IgG serology, which stays positive years after eradication. Essential for any patient with chronic acidity, gastritis, bloating, or ulcers.
• Hydrogen-methane breath test (SIBO test) — diagnoses small intestinal bacterial overgrowth, the root cause behind many IBS cases. Involves drinking a sugar solution and measuring exhaled gases.
• Stool calprotectin — distinguishes IBD (elevated) from IBS (normal) without colonoscopy; avoids unnecessary invasive investigation
• Thyroid panel (TSH, Free T3, Free T4) — hypothyroidism causes constipation, bloating, and weight gain that exactly mimic gut disorders and is frequently missed

Tests That Are Often Overused or Misused

• Food intolerance IgG panels — detect antibody exposure, not true allergy or clinical intolerance; not validated as diagnostic tools and frequently lead to unnecessarily restrictive diets
• Stool microbiome sequencing panels — highly detailed but currently lack standardised clinical interpretation; results rarely change treatment in a specific, actionable way
• H. pylori IgG serology — stays positive for years after successful eradication; not useful for confirming active infection

What Your Gut Test Results Actually Mean

Test results need clinical interpretation, not just normal/abnormal reading. A normal SGPT doesn't rule out fatty liver (ultrasound is needed). A negative H. pylori breath test post-treatment confirms eradication but doesn't confirm mucosal healing. Elevated stool calprotectin needs colonoscopy to determine the cause. The most important question about any gut test is: does this result change my treatment plan? If not, it may not be worth doing.

Testing Before and After Treatment

At Thavira, testing is used at two points: before treatment to confirm root cause, and after treatment to confirm resolution. H. pylori should be retested 4–8 weeks after completing eradication treatment. SIBO breath tests are repeated after the herbal protocol to confirm clearance. Treating without testing risks addressing the wrong cause; not retesting after treatment risks assuming cure without confirmation.

The AYUSH Approach to Gut Testing

AYUSH medicine uses targeted testing — not comprehensive panels — to confirm what clinical assessment suggests. At Thavira, we order only the tests that will change the protocol. Our practitioners then interpret results in the context of your full symptom picture, constitutional assessment, and treatment history to design a protocol specific to the confirmed root cause — not a generic gut health programme.