Small Intestinal Bacterial Overgrowth (SIBO) is a condition that affects the small intestine and found in those that suffer from Irritable Bowel Syndrome with diarrhea. Today, absence of an accurate diagnostic method prevents early detection and treatment of this condition. Scientists at the SN Bose National Centre for Basic Sciences and Dr. Sujit Chaudhuri from AMRI Hospital, Kolkata, have now developed an improvised accurate diagnostic method that proposes to measure the amount of hydrogen sulphide gas in a patient’s breath. Due to increased bacterial activity in the small intestine, hydrogen sulphide is produced in larger quantities in patients suffering from SIBO. This research hopes to help in early detection and treatment of SIBO, thus guaranteeing a better quality of life for those with IBS and diarrhea.