Understanding Faecal Calprotectin Levels: Normal Values and Their Significance

Faecal calprotectin is a protein found in your stool that can help indicate inflammation in your intestines. It is often used to distinguish between inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS). Understanding your faecal calprotectin test results can provide insight into your bowel health and guide further medical evaluation if necessary.

What is faecal calprotectin?

Faecal calprotectin is a protein that is released by white blood cells when there is inflammation in the intestines. A stool test measures the level of this protein, providing valuable information about potential intestinal inflammation. This test is particularly useful in helping differentiate between inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS), as they can have similar symptoms but require different treatments.

Normal values of faecal calprotectin

The normal range for faecal calprotectin can vary depending on the specific test assay used. Generally, a level of less than 50 µg/g is considered normal. However, it is important to note that this value can be assay-dependent, meaning different laboratories might use different reference ranges. It's best to discuss your specific result with your healthcare provider to understand its implications fully.

Why is faecal calprotectin important?

Faecal calprotectin is an important marker because it helps identify inflammation in the intestines. Elevated levels of faecal calprotectin suggest the presence of inflammatory bowel disease (IBD), such as Crohn's disease or ulcerative colitis, which are conditions that cause chronic inflammation of the gastrointestinal tract. On the other hand, irritable bowel syndrome (IBS), which is a functional bowel disorder, typically does not cause elevated faecal calprotectin levels.

Factors affecting faecal calprotectin levels

Several factors can affect faecal calprotectin levels, including age, diet, and medications. For example, non-steroidal anti-inflammatory drugs (NSAIDs) can sometimes increase faecal calprotectin levels. Infections of the gastrointestinal tract can also temporarily elevate levels. Therefore, it is essential to consider these factors when interpreting test results.

Frequently asked questions

What conditions can cause elevated faecal calprotectin? Elevated faecal calprotectin levels can be caused by inflammatory bowel diseases such as Crohn's disease and ulcerative colitis. Other causes may include infections or the use of certain medications like NSAIDs.

Can stress affect faecal calprotectin levels? Stress does not directly affect faecal calprotectin levels, but it can exacerbate symptoms of conditions like IBS, which may prompt testing.

How is the faecal calprotectin test performed? The test involves collecting a small stool sample, which is then sent to a laboratory to measure the level of calprotectin.

Is fasting required before a faecal calprotectin test? No, fasting is not required before a faecal calprotectin test.

Can diet affect faecal calprotectin levels? Certain foods or dietary patterns may influence gastrointestinal health, but they do not directly alter faecal calprotectin levels.

When to see a doctor

If your faecal calprotectin levels are elevated, it is important to follow up with your healthcare provider. They can help determine the cause of the inflammation and discuss potential next steps, which may include further testing or treatment. If you experience persistent symptoms such as abdominal pain, diarrhea, or unexplained weight loss, consult your doctor for a comprehensive evaluation.

Always discuss your test results and health concerns with a healthcare professional to ensure you receive appropriate guidance and care.