Low Faecal calprotectin: what it means
A Faecal calprotectin result below the normal range is considered low. Here is what a reduced Faecal calprotectin can point to, and when it is worth discussing with a doctor.
Reference range: <50 µg/g normal (assay-dependent); a stool test — raised in inflammatory bowel disease and helps separate IBD from IBS
Understand your full resultWhat a low Faecal calprotectin can mean
- Normal — makes inflammatory bowel disease unlikely and points towards irritable bowel syndrome, often sparing an invasive test.
- A falling level in known IBD — suggests the inflammation is settling and treatment is working (remission).
When to discuss with a doctor
Faecal calprotectin is most useful when the question is whether ongoing bowel symptoms — persistent diarrhoea, abdominal pain, altered habit — come from inflammation (IBD) or from a non-inflammatory cause such as irritable bowel syndrome. A normal result is reassuring and can avoid an unnecessary colonoscopy; a clearly raised result points to inflammation that needs investigating, usually with endoscopy. In someone with known Crohn's or ulcerative colitis, the level is followed to judge disease activity and response to treatment. Because infections and some painkillers can raise it, the result is read with the clinical picture. Any raised calprotectin, or alarm features such as bleeding, weight loss or anaemia, should be discussed promptly. Mediora.AI shows calprotectin alongside CRP, blood count and albumin so the inflammation pattern is visible; the interpretation belongs with your doctor.
Conditions this can relate to
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Upload your test - freeMediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.