Fecal Calprotectin Quantitative is a non-invasive stool test that measures intestinal inflammation. Learn how it helps distinguish inflammatory bowel disease from functional disorders like IBS.
Digestive symptoms such as abdominal pain, diarrhoea, bloating, and changes in bowel habits are extremely common. However, these symptoms can arise from many different conditions — ranging from functional disorders such as irritable bowel syndrome (IBS) to inflammatory diseases of the intestine.
Fecal Calprotectin Quantitative is a non-invasive laboratory test that measures the concentration of calprotectin in stool and provides an indication of intestinal inflammation.
At Life Quest Clinical Lab, we offer quantitative fecal calprotectin testing to support physicians in the evaluation and monitoring of patients with suspected intestinal inflammatory disorders.
What Is Calprotectin?
Calprotectin is a protein found predominantly in certain white blood cells, particularly neutrophils. When inflammation occurs in the gastrointestinal tract, neutrophils migrate into the intestinal tissues and release calprotectin. Because calprotectin is relatively stable in stool, measuring its concentration provides a useful non-invasive marker of intestinal inflammation.
Why Is Fecal Calprotectin Testing Important?
One of the important clinical uses of fecal calprotectin is helping distinguish inflammatory bowel disease (IBD) from conditions where significant intestinal inflammation is less likely. IBD primarily includes:
- Crohn's disease
- Ulcerative colitis
Patients with these conditions may experience persistent diarrhoea, abdominal pain, urgency, blood or mucus in stool, unexplained weight loss, or other gastrointestinal complaints.
Fecal calprotectin can provide physicians with objective information about intestinal inflammation and may help determine whether further investigations, such as endoscopy, should be considered.
Fecal Calprotectin and IBS: Why the Difference Matters
Irritable bowel syndrome (IBS) is a common functional gastrointestinal disorder. Unlike inflammatory bowel disease, IBS does not typically cause significant intestinal inflammation.
A low fecal calprotectin concentration makes significant intestinal inflammation less likely, while an elevated result may indicate that further clinical evaluation is warranted. Fecal calprotectin is not a standalone diagnostic test for IBD — results should always be interpreted together with symptoms, clinical examination, medical history, and other investigations.
Who May Benefit from This Test?
Your physician may consider this test if you have persistent or unexplained gastrointestinal symptoms, particularly:
- Persistent diarrhoea — especially when symptoms continue or recur without an obvious explanation.
- Recurrent abdominal pain — when accompanied by other features suggesting possible intestinal inflammation.
- Suspected inflammatory bowel disease — when Crohn's disease or ulcerative colitis is being considered.
- Monitoring patients with established IBD — to assess intestinal inflammation over time and response to treatment.
- Differentiating inflammatory and functional bowel disorders — to help decide whether symptoms are more suggestive of an inflammatory process.
A Quantitative Test Gives More Information
Unlike a simple qualitative result, quantitative fecal calprotectin testing provides a numerical concentration. This allows the clinician to assess the degree of elevation and, when appropriate, compare results over time. Serial measurements can be useful in patients being followed for inflammatory bowel disease, though interpretation should always take into account the clinical situation and established reference limits.
Does an Elevated Result Always Mean IBD?
No. An elevated fecal calprotectin level indicates that intestinal inflammation may be present, but it does not by itself establish the cause. In addition to inflammatory bowel disease, elevated calprotectin may occur in other gastrointestinal conditions. Certain medications and other factors may also influence results. An abnormal result should always be evaluated by the treating physician and, when appropriate, followed by additional investigations.
Don't Ignore Persistent Digestive Symptoms
Persistent diarrhoea, recurrent abdominal pain, unexplained changes in bowel habits, or other ongoing gastrointestinal symptoms deserve appropriate medical evaluation.
If your physician suspects intestinal inflammation, quantitative fecal calprotectin testing may provide valuable information to guide the next step in your diagnostic journey.
For test availability, sample requirements, turnaround time, and further information, please contact Life Quest Clinical Lab.