Small intestinal bacterial overgrowth (SIBO) occurs when there is an abnormal increase in gut bacteria in the small intestine. This overgrowth of bacteria can cause uncomfortable symptoms such as bloating, abdominal pain, diarrhea, and/or constipation. Affected individuals may also experience a loss of appetite, leading to unintentional weight loss and malnutrition. Research suggests that hydrogen-producing bacteria are more commonly associated with diarrhea, while methane-producing ones tend to