Small Intestine Bacterial Overgrowth (SIBO) occurs when bacteria normally in the large intestine begin to gather in higher than usual numbers in the small intestine. One reason for this is due to the migrating motor complex (MMC) failing to effectively push bacteria back to the large intestine between meals. In the small intestine, the bacteria multiply and feed off carbohydrates from food, producing hydrogen and methane gas. It’s these gases that are responsible for the abdominal pain, flatulence, constipation, diarrhoea and bloating associated with SIBO. 

SIBO is thought to be a major cause of many IBS cases. Bacterial overgrowth can also lead to malabsorption, anaemia and pale fatty stools. SIBO is also associated with a number of conditions beyond digestion and absorption including:

• Fibromyalgia
• Skin conditions like acne rosacea, 
• Weight gain
• Parkinson’s Disease

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