Small Intestinal Bacterial Overgrowth (SIBO)

LAB TESTING

Small Intestinal Bacterial Overgrowth is, as its name implies, abnormally high levels of bacteria in the small intestine. SIBO commonly co-exists with IBS.

SIBO is detected by hydrogen- and methane-gas breath tests. This test involves swallowing a sample of a sugar substrate (glucose). In response to glucose, the bacteria in the small intestine produce abnormally high levels of hydrogen and/or methane as byproducts. These gases are then measured and analyzed through breath collection. 

Testing for SIBO may be indicated when a patient has the following persistent symptoms:

• Abdominal pain

• Bloating

• Worsening of symptoms with probiotic consumption

• Gas or flatulence

• Diarrhea, constipation, or mixed patterns