What is fecal elastase-1?

Fecal elastase-1 (FE-1) is a pancreatic enzyme measured in a stool sample. Because elastase is stable through the gut and is concentrated in stool, its level reflects how much enzyme the pancreas is secreting. Low levels indicate exocrine pancreatic insufficiency (EPI).

What is the normal fecal elastase-1 range?

A value of 200 mcg/g stool or higher is generally considered normal. Values between 100–199 mcg/g indicate mild to moderate EPI, and values below 100 mcg/g indicate severe EPI. These cutoffs apply to the standard ELISA method.

Can watery stool affect the result?

Yes. Liquid or very loose stools dilute the stool sample, which can lower the measured elastase concentration and produce a false-low result. The tool flags this consideration when a low value is entered. Your physician may repeat the test with a formed stool sample.

Does a low result mean I need pancreatic enzyme replacement therapy?

Not necessarily on its own. The result should be interpreted alongside symptoms (weight loss, fatty stools, bloating), medical history, and imaging. Your doctor will decide whether PERT is appropriate based on the complete clinical picture.

What conditions can cause a low fecal elastase result?

Chronic pancreatitis, cystic fibrosis, type 1 and type 3c diabetes, pancreatic cancer, celiac disease (via small bowel mucosal damage), and post-pancreatectomy states are common causes. Crohn's disease and other small bowel disorders can also reduce values.

Is this tool a substitute for medical advice?

No. This tool provides educational information based on published reference ranges. Always discuss your results and symptoms with a qualified healthcare provider before making any treatment decisions.

Fecal Elastase Interpretation Helper

Enter your fecal elastase-1 result to get an instant severity classification and clinical guidance for exocrine pancreatic insufficiency.

Enter Lab Result

Fecal Elastase-1 Value

mcg/g stool

Typical lab range reported: 0 – 500+ mcg/g

Test Method

ELISA is the standard; cutoffs may differ for other methods.

Stool Consistency

Formed / semi-formed Loose / watery

Enter a value on the left and press
Interpret Result to see your classification.

Classification

Reference Scale (ELISA Method)

Severe EPI< 100 mcg/g

Mild / Moderate EPI100 – 199 mcg/g

Normal≥ 200 mcg/g

Suggested Next Steps

This tool is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider to interpret your results.

Summary

The fecal elastase-1 (FE-1) test is a non-invasive stool test used to screen for exocrine pancreatic insufficiency (EPI) — a condition where the pancreas does not produce enough digestive enzymes. This tool interprets your numeric result against established reference ranges, classifying severity as normal, mild/moderate, or severe EPI, and explains what each category means clinically. It is designed to help patients understand their lab report and prepare informed questions for their physician.

How it works

Enter your fecal elastase-1 value (in mcg/g stool) from your lab report.
Select the test method used by your lab (most labs use ELISA).
The tool classifies the result as normal, mild/moderate EPI, or severe EPI.
Read the severity summary, what the range means, and suggested next steps.
Use the information to prepare questions for your gastroenterologist or physician.

Use cases

Understanding a fecal elastase-1 result before a follow-up appointment.
Screening for exocrine pancreatic insufficiency in patients with chronic diarrhea or steatorrhea.
Supporting clinical decision-making around pancreatic enzyme replacement therapy (PERT).
Educating patients with chronic pancreatitis, cystic fibrosis, or diabetes about EPI risk.
Distinguishing severe EPI from mild/moderate based on published cutoffs.
Quick reference for clinicians reviewing lab results at the point of care.

Frequently Asked Questions

Last updated: 2026-06-18 · Reviewed by Nham Vu