Reducing Substances, Qualitative, Stool


Carbohydrate malabsorption is a major cause of the watery diarrhoea and electrolyte imbalance seen in patients with short bowel syndrome. As a result of bacterial fermentation, the stool becomes acidic with a high concentration of lactic acid. The pH measurement reflects this process. The unabsorbed sugars are measured as reducing substances.


Used in the diagnosis of deficiency in intestinal enzymes, primarily disaccharidase, in infants with persistent diarrhea.

Sample Type, Quantity & Conditions

Stool Room Temperature

Special Precautions

Avoid samples collected in diapers or other absorbent surfaces.

Normal Range


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