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Disaccharide Digestive Enzyme Activity in Stool (Qualitative)

Published: August 9, 2026Updated: August 16, 2026

This test checks whether certain enzymes in your stool can properly break down carbohydrates like lactose or sucrose, which may be missing due to conditions like celiac disease or other digestive disorders.

Quick summary

["Assesses enzyme function that aids in carbohydrate digestion in stool samples."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
89229-9
Short code
OB Discharge teach note
Synonyms
OB Discharge teach note
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
obstetrics
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like chronic diarrhea, bloating, or gas after eating certain foods (e.g., dairy or sugary items). It helps identify if digestive enzymes are insufficient, which can cause trouble absorbing nutrients.

What to Expect Before the Test

No special preparation is needed. Bring any medications you’re currently taking, as some may affect results. Avoid giving your child dairy products (like milk) for 24 hours before testing if instructed by your doctor.

How the Test Works

A small sample of your stool is collected and tested for enzyme activity. The test looks for signs of normal digestion by measuring how well enzymes break down specific carbohydrates in the stool.

Possible Results and Next Steps

If results are normal, your digestive enzymes likely work as expected. If abnormal, further testing (like genetic evaluation or a gluten challenge) may be needed to diagnose conditions like celiac disease or lactose intolerance.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Stool Digestive Enzyme Screen

Frequently asked questions

What causes abnormal enzyme activity in stool?
Conditions like celiac disease, pancreatic insufficiency, or certain genetic disorders (e.g., lactase deficiency) can lead to abnormal enzyme activity. Other factors, such as infections or inflammatory bowel disease, may also play a role.
How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will discuss the findings with you during your follow-up visit.
Can I eat or drink anything before the test?
Follow your doctor’s instructions—usually, you can eat normally, but avoid dairy products (if applicable) for 24 hours before testing to ensure accurate results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy