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Also reported in: mg/kg, µg/g
Your fecal calprotectin is in the normal range. This result helps distinguish IBD (which causes elevated calprotectin) from functional gut conditions like IBS (which typically do not).
Your fecal calprotectin is undetectable, indicating no measurable intestinal inflammation. Calprotectin is released by neutrophils (white blood cells) in an inflamed gut. An undetectable level is the ideal result.
No action needed. Your gut appears free of neutrophilic inflammation.
Fecal calprotectin undetectable — no intestinal inflammation detectedYour fecal calprotectin is within the normal reference range. This indicates no significant intestinal inflammation and makes inflammatory bowel disease (Crohn's disease, ulcerative colitis) unlikely as the cause of any gastrointestinal symptoms.
No action needed. If you have gastrointestinal symptoms, functional causes (IBS) are more likely given this normal result.
Fecal calprotectin within normal reference range — no significant intestinal inflammationYour fecal calprotectin is in the low-normal range. This is a reassuring result indicating minimal intestinal inflammation.
No action needed.
Fecal calprotectin: low-normal — no significant gut inflammationYour fecal calprotectin is in the normal range. This result helps distinguish IBD (which causes elevated calprotectin) from functional gut conditions like IBS (which typically do not).
No specific action required. Normal calprotectin with gut symptoms points toward functional GI conditions.
Fecal calprotectin within reference range — acceptable intestinal inflammation levelYour fecal calprotectin is in the optimal range, indicating very low intestinal inflammatory activity. This is an excellent result for gut health.
No action needed.
Fecal calprotectin: optimal — minimal intestinal inflammatory activityYour fecal calprotectin is mildly above the reference range. This may indicate mild gut inflammation from IBD, NSAID use, gastroenteritis, celiac disease, or a colorectal polyp. Mild elevation is not diagnostic on its own and warrants repeat testing and clinical assessment.
Discuss with your gastroenterologist. Repeat fecal calprotectin after 4–6 weeks (avoiding NSAIDs if possible). Further investigation with colonoscopy may be recommended if elevation persists.
Fecal calprotectin 50–200 mcg/g — borderline elevated; intestinal inflammation possible; repeat testing recommendedYour fecal calprotectin is significantly elevated, indicating active intestinal inflammation. At this level, inflammatory bowel disease (Crohn's disease or ulcerative colitis) is a serious concern. Other causes include infections, NSAID enteropathy, and colorectal cancer.
Seek gastroenterology referral. Colonoscopy and/or small bowel imaging should be arranged promptly to identify the cause of intestinal inflammation. Do not delay if you have symptoms including blood in stool, abdominal pain, or weight loss.
Fecal calprotectin >200 mcg/g — significantly elevated; active intestinal inflammation detectedYour fecal calprotectin is critically elevated, indicating noticeable active intestinal inflammation. This level is associated with active IBD flare, noticeable colitis, or other serious intestinal pathology. Urgent investigation is required to prevent complications including perforation, toxic megacolon, or noticeable nutritional deficiency.
Seek urgent gastroenterology evaluation. Colonoscopy and urgent clinical assessment should be arranged immediately. Active IBD at this level may require hospitalization and intensive treatment.
Fecal calprotectin >1800 mcg/g — critically elevated; noticeable active intestinal inflammationUpload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.