Small Intestinal Bacterial Overgrowth (BOSI/SIBO) Test Prep


Instructions for Patients

Test Collection Instructions Video

This video will demonstrate how to collect your breath sample with the Small Intestinal Bacterial Overgrowth specimen collection pack from Genova Diagnostics.

Additional specimen collection instructions are also provided below for your convenience.

Important Prep before Patient Takes Test

2 – 4 Weeks before the Test:

  • Wait at least 4 weeks from colonoscopy or barium enema
  • Wait at least 2–4 weeks from your last dose of antibiotics, antifungals or Pepto-Bismol

7 Days before the Test

Avoid the use of laxatives, stool softeners and/or stool bulking agents as well as antacids containing aluminum or magnesium hydroxide

24 Hours before the Test

  • Foods you CAN eat before you start your 12 hour fast: Baked or broiled chicken, fish or turkey (salt and pepper only), white bread (only), plain steamed white rice, eggs, clear chicken or beef broth with no vegetables pieces, water, plain coffee or tea (no sugar/artificial sweeteners or cream)
  • Vegetarians may have tofu with salt and pepper
  • Do not take probiotics

12 Hours before the Test

  • Fast for 12 hours prior to the test
  • Do not eat or drink anything other than water during the specified time frame
  • Do not take non-essential medications or supplements until the test is completed, unless your physician has advised you otherwise
  • Do not chew gum, eat candy, or use mouthwash until the test is completed

1 Hour before the Test

  • No smoking, including second-hand smoke, for at least 1 hour before or at any time during the breath test
  • No sleeping or vigorous exercise for at least 1 hour before or at any time during the breath test

More Info – BOSI/SIBO Test Order Page