Fecal pH test
Medical diagnostic method
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A faecal pH test is one where a specimen of faeces is tested for acidity in order to diagnose a medical condition.
The pH of human faeces is variable but the average is pH 6.6 (acidic) for normal faeces.[1][2] A lower faecal pH (very acidic stool) can indicate a digestive problem such poor absorption of carbohydrates or fats,[3] lactose intolerance,[4] an infection such as E. coli or rotavirus, or overgrowth of acid-producing bacteria (such as lactic acid bacteria).
Test procedure
Results
Unhealthy individuals with a higher or lower pH rate have been observed having a higher mortality rate. A high alkaline pH rating is associated with the body's inability to create enough acid along with undigested food.[6]