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Stool Tests: Normal Values

By Frank H. Wians, Jr., PhD, Professor and Clinical Chemist, Department of Pathology, Texas Tech University Health Sciences Center El Paso

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Normal Laboratory Values: Stool

Test

Conventional Units

SI Units

Fat

< 5 g/day in patients on a 100-g fat diet

Nitrogen

< 2 g/day

Urobilinogen

40–280 mg/24 h

68–473 mg/24 h

Weight

< 200 g/day

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