Understanding Lab Tests for Irritable Bowel Syndrome
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Irritable Bowel Syndrome (IBS) is a functional gastrointestinal disorder characterized by abdominal pain, bloating, and changes in bowel habits. There is no single blood test that can diagnose IBS itself, as diagnosis is typically based on symptoms and the exclusion of other conditions. However, laboratory testing plays an important supporting role in managing IBS by identifying potential dietary triggers that may worsen symptoms.
Recommended Test
Food Specific IgG Beet Root
This test measures IgG antibody levels specific to beet root, which may help identify if this food could be contributing to IBS symptoms. While research is ongoing, some evidence suggests that elevated IgG levels to certain foods may exacerbate symptoms in people with IBS, and some patients have found symptom relief after eliminating foods with high IgG antibody responses from their diet.
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The Role of Food Sensitivity Testing in IBS
Many individuals with IBS find that certain foods can trigger or worsen their symptoms. Food sensitivity testing, which measures IgG antibody responses to specific foods, can help identify potential dietary triggers. While the relationship between food-specific IgG levels and IBS symptoms is still being researched, some patients have experienced symptom improvement after eliminating foods that show elevated antibody responses.
Understanding Your Results
Food sensitivity testing should be interpreted as part of a comprehensive approach to managing IBS. Results can guide dietary modifications, but it's important to work with healthcare providers to develop an appropriate elimination and reintroduction plan. Not all elevated IgG responses necessarily indicate problematic foods, and dietary changes should be made systematically under professional guidance.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment of IBS and before making significant dietary changes.
