| Lactulose |
- Is a synthetic sugar unable to be absorbed by the body
- Is compulsory baseline test to exclude H2 non-producer.
- To determine oro-caecal transit time.
- Is an indicator for the necessity of the SIBO test.
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| Fructose |
- Fructose is a single molecule sugar (monosaccharide) present in many fruits as well as honey and onions.
- For Fructose malabsorption and recommended in all IBS patients, especially those with symptoms related to fruit ingestion.
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| Lactose |
- For lactose malabsorption (lactase deficiency), recommended in all IBS patients, especially those with symptoms related to milk/dairy products
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| Glucose |
- Recommended for investigation of proximal and distal small intestinal bacterial overgrowth (SIBO)
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| Sorbitol |
- For suspected malabsorption of sorbitol, found in some fruits (e.g. stone fruits) and as a sweetener in sugar-free foods
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| Sucrose |
- For suspected sucrose malabsorption (sucrase-isomaltase deficiency). Sucrose is found in processed foods, fruits and vegetables
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| Mannitol |
- For suspected mannitol malabsorption, particularly in vegetarians. Mannitol is used as a sugar substitute (in vegetarian food, chewing gums, breath mints, and sugar free lollies) and also occurs naturally in some vegetables e.g. cauliflower, mushroom and watermelon.
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| Fructan (Inulins) |
- For suspected fructan malabsorption. Foods that are high in fructans may include wheat products (such as bread, pasta), onions, shallots, garlic, barley, cabbage, broccoli, pistachio, artichoke, chicory root, and asparagus.
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