Faecal blood (human haemoglobin)

This test is done to detect small, invisible amounts of human blood in stool using antibodies specific to human hemoglobin. It helps identify bleeding in the gastrointestinal tract, which may be caused by colorectal cancer, polyps, ulcers, or inflammatory bowel disease. It is commonly used as a screening tool for early detection of colorectal cancer.

• Fasting: Not required.
• No dietary restrictions are usually needed (unlike older guaiac tests).
• Avoid contamination with urine or water.
• Follow any instructions provided by the laboratory or healthcare provider.