label: Elevated stool reducing substances
label_lc: elevated stool reducing substances
description: Elevated level of reducing substances in the feces. If carbohydrate malabsorption is suspected, a reducing substance should be investigated in the stool using the Benedict or Fehling test. The presence of reducing substances may indicate an abnormality in carbohydrate (e.g., sucrose, lactase) metabolism. The unabsorbed sugars in stool are measured as reducing substances.