Stool Calprotectin and IBS: What You Need to Know
If you’ve been diagnosed with Irritable Bowel Syndrome (IBS) or are experiencing ongoing digestive symptoms, your provider may order a stool calprotectin test. This simple, non-invasive test helps determine whether your symptoms are caused by inflammation—or something else.
Understanding your results can help guide the next steps in your care.
What Is Stool Calprotectin?
Calprotectin is a protein released by white blood cells when there is inflammation in the body.
When inflammation occurs in the intestines, calprotectin is released into the digestive tract and can be measured in your stool.
Why Is This Test Important for IBS Patients?
IBS is considered a functional gastrointestinal disorder, meaning it causes symptoms without visible inflammation or damage to the digestive tract.
A stool calprotectin test helps answer a key question:
Are your symptoms due to inflammation—or not?
- Normal or low calprotectin → More consistent with IBS
- Elevated calprotectin → May suggest an inflammatory condition
This distinction helps avoid unnecessary procedures while ensuring serious conditions aren’t missed.
What Does a High Calprotectin Level Mean?
If your stool calprotectin is elevated, it usually means there is inflammation in the intestines—which is not typical for IBS.
Your provider may recommend additional testing to look for underlying causes.
Conditions That Can Mimic IBS Symptoms
Several conditions can cause symptoms similar to IBS but involve inflammation. These include:
- Inflammatory Bowel Disease (IBD)
Conditions like Crohn’s disease and ulcerative colitis can cause abdominal pain, diarrhea, and urgency—much like IBS—but involve chronic intestinal inflammation.
- Intestinal Infections
Bacterial, viral, or parasitic infections can temporarily inflame the gut and cause IBS-like symptoms.
- Celiac Disease
celiac disease is an immune reaction to gluten that damages the small intestine and may raise calprotectin levels.
- Colorectal Cancer (Less Common)
In rare cases, elevated calprotectin may be associated with colorectal cancer, which is why follow-up testing is sometimes important.
- Medications and Other Triggers
Certain medications, especially NSAIDs (like ibuprofen), and some food sensitivities can also increase calprotectin levels.
What If Your Calprotectin Is Normal?
A normal result can be reassuring.
It suggests that your symptoms are more likely due to IBS rather than inflammation, which can help:
- Reduce the need for invasive tests like colonoscopy
- Support a diagnosis of IBS
- Focus treatment on symptom management (diet, stress, gut-brain therapies)
When Should IBS Patients Follow Up?
Even if you have IBS, contact your healthcare provider if you notice:
- Blood in your stool
- Unintentional weight loss
- Persistent or worsening symptoms
- New symptoms after age 50
These may warrant further evaluation.
The Bottom Line for IBS Patients
Stool calprotectin is a valuable tool for distinguishing IBS from inflammatory conditions.
- IBS does not typically cause elevated calprotectin
- High levels suggest inflammation and the need for further testing
- Normal levels support an IBS diagnosis and guide treatment
Important Disclaimer
This content is for educational purposes only and should not replace medical advice. Always consult your healthcare provider for diagnosis and treatment decisions.
Need Help Managing IBS?
If you’re struggling with IBS symptoms or aren’t sure what your test results mean, Neighborhood Gastroenterology & Nutrition is here to help. Schedule an appointment today for personalized, expert care.
Best of Health,
Dr. Lyday
