What is the prep diet for SIBO test?

The preparatory diet for a SIBO breath test is a strict 24-hour protocol designed to starve gut bacteria, ensuring accurate baseline gas measurements on the day of your test. For the first 12 hours, you must consume only low-residue, non-fermentable foods. This includes plain skinless chicken breast, white rice, eggs, baked white fish, and plain water, while strictly avoiding all fiber, sugars, vegetables, fruit, grains, and dairy. The final 12 hours of the preparation period require a strict water-only fast, with no food, coffee, tea, or supplements allowed. Following this protocol perfectly prevents false-positive results. To ensure your test is accurate, read our detailed step-by-step instructions on [SIBO breath test prep](/sibo-breath-test-prep).

Disclaimer: This content is reviewed and fact-checked by Daryl Stubbs, Certified Holistic Nutritional Consultant (C.H.N.C), for educational purposes. It does not constitute medical advice or a doctor-patient relationship.