This test is used to detect Small Intestinal Bacterial Overgrowth (SIBO). SIBO occurs when bacteria enter your normally sterile small intestine and begin to colonize. Patients with bacterial overgrowth typically develop symptoms including nausea, bloating, vomiting, diarrhea, malnutrition, weight loss and malabsorption. NOTE: THIS TEST DOES NOT COME WITH A SUBSTRATE. YOU MUST PRESCRIBE THE LACTULOSE SUBSTRATE TO YOUR PATIENT. IF YOU CANNOT PRESCRIBE LACTULOSE, PLEASE ORDER THE SIBO BREATH TEST - GLUCOSE.