Free Shipping on All Orders $75 Or More! Ends Soon.

Your Trusted Brand for Over 35 Years

SIBO Home Breath Kit – Glucose

Item# LC100064

Your Price:
$179.00 Save 25%

SIBO Home Breath Kit – Glucose

Small Intestinal Bacterial Overgrowth

Item# LC100064

Retail Price: $238.66

Your Price: $179.00 Save 25%

Add to Wish Lists


  • SIBO Home Breath Kit – Glucose
  • Item Catalog Number: LC100064

Small Intestinal Bacterial Overgrowth (SIBO) occurs when intestinal bacteria overgrow in the small intestine. This overgrowth can lead to excess production of gas and bacterial metabolites, causing symptoms of bloating, flatulent, diarrhea, constipation, and cramping. Recent studies show that up to 78% of individuals diagnosed with irritable bowel syndrome (IBS) have SIBO.1 SIBO can also be present in those with gastrointestinal symptoms who do not have an IBS diagnosis. An at-home SIBO breath test that can help determine the cause of digestive distress.

Life Extension offers two options for SIBO testing, a kit containing a glucose solution, and a kit contacting a lactulose solution. Both glucose and lactulose are sugars that bacteria can digest (ferment). The fermentation of these sugars results in the production of hydrogen and/or methane gas. Both of our SIBO tests provide the distinct advantage of measuring both gases, which, when present, may indicate SIBO.

Sample ReportInstructions

Difference between Glucose and Lactulose SIBO Breath Tests:

  • Although glucose is highly fermentable by bacteria, it is typically absorbed in the upper portion of the small intestines; thus, if SIBO exists in the lower portion of the small intestines, it may be missed.2
  • Lactulose has the advantage of detecting bacterial overgrowth throughout the small intestine, including the lower end where it most commonly occurs. Humans cannot digest or absorb lactulose, only bacteria have the proper enzymes to do so. Since it is not absorbed, lactulose travels the entire length of the intestine, revealing SIBO at all portions of the intestine.2 Lactulose may be slightly less fermentable than glucose,3 but its ability to traverse the colon outweighs any difference in fermentation.

Which test should I take?

We suggest starting with the lactulose test because it examines the entire small intestine for SIBO. However, if the lactulose test is negative and a person is still experiencing symptoms, then we suggest following up with a glucose test since more bacteria can ferment glucose.3


This test requires a 12 hour preparation diet followed by a 12 hour overnight fast (you can find the instructions for the preparation diet attached to this product description). Breath samples are then collected over a 3-hour period and shipped directly to the laboratory in a pre-paid envelope. All necessary components for the breath test are included in the kit with a complete set of instructions for easy collection. Customers considering the SIBO breath test should be aware of the following restrictions:

  • Wait at least 14 days before beginning your breath test if you recently had antibiotic therapy, bismuth preparations, runny diarrhea, colonoscopies, barium studies, or enemas.
  • Discontinue natural/herbal products that alter gut bacteria (oregano oil, berberine, grapefruit seed extract, etc), laxatives (natural and pharmaceutical) and probiotics/prebiotics for at least 7 days prior to testing.
  • Do not discontinue any prescribed medications without speaking to your doctor.
  • Supplements should be avoided during the 24 hours prior to sample collection unless absolutely necessary.
  • This test is not designed for individuals under 25 lbs.
  • Consult with your physician if you have hyper or hypoglycemia (high or low blood sugar) before taking the glucose breath test.


Due to the unique collection kit required for the SIBO breath test, there is a $25 nonrefundable fee for the kit. If a new kit is needed due to collection error, the cost is $25. If this test is not used within 6 months and the kit expires, a replacement kit at a cost of $25 will be incurred. Results take 10 days from when specimen is received. The results for this test can only be received via mail, e-mail, or fax.


  1. Ghoshal UC, Srivastava D. Irritable bowel syndrome and small intestinal bacterial overgrowth: Meaningful association or unnecessary hype. World Journal of Gastroenterology: WJG. 2014;20(10):2482-2491. doi:10.3748/wjg.v20.i10.2482.
  2. Rezaie A, Buresi M, Lembo A, et al. Hydrogen and Methane-Based Breath Testing in Gastrointestinal Disorders: The North American Consensus. The American Journal of Gastroenterology. 2017;112(5):775-784. doi:10.1038/ajg.2017.46.
  3. Sahota SS, Bramley PM, Menzies IS. The fermentation of lactulose by colonic bacteria. Microbiology. 1981;128(2):319–325

The laboratory services are for informational purposes only. It is not the intention of National Diagnostics, Inc and Life Extension to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.

Both the physician and the testing laboratory are independent contractors with whom National Diagnostics, Inc makes arrangements for your blood tests. Neither National Diagnostics, Inc or Life Extension will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.


Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews. Please read the full product reviews disclaimer.