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Stool Analysis

Results continued...

The normal values listed here-called a reference range-are just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Your lab report should contain the range your lab uses. Also, your doctor will evaluate your results based on your health and other factors. This means that a value that falls outside the normal values listed here may still be normal for you or your lab.

Stool analysis test results usually take at least 1 to 3 days.

Stool analysis

The stool appears brown, soft, and well-formed in consistency.

The stool does not contain blood, mucus, pus, undigested meat fibers, harmful bacteria, viruses, fungi, or parasites.

The stool is shaped like a tube.

The pH of the stool is 7.0-7.5.1

The stool contains less than 0.25 grams per deciliter (g/dL)[less than 13.9 millimoles per liter (mmol/L)] of sugars called reducing factors.1

The stool contains 2-7 grams of fat per 24 hours (g/24h).1


The stool is black, red, white, yellow, or green.

The stool is liquid or very hard.

There is too much stool.

The stool contains blood, mucus, pus, undigested meat fibers, harmful bacteria, viruses, fungi, or parasites.

The stool contains low levels of enzymes, such as trypsin or elastase.

The pH of the stool is less than 7.0 or greater than 7.5.

The stool contains 0.25 g/dL (13.9 mmol/L) or more of sugars called reducing factors.

The stool contains more than 7 g/24h of fat (if your fat intake is about 100 g a day).

Many conditions can change the results of a stool analysis. Your doctor will talk with you about any abnormal results that may be related to your symptoms and past health.

Abnormal values

WebMD Medical Reference from Healthwise

Last Updated: September 09, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

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