Understanding Lab Tests for Immune System Disorders
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Immune system disorders encompass a wide range of conditions where the body's immune response is either weakened, overactive, or misdirected. While there isn't a single blood test that can diagnose all immune system disorders, laboratory testing is fundamental for assessing immune function, identifying nutritional deficiencies that may impact immunity, and monitoring the body's overall health status.
Recommended Test
Selenium, 24-Hour Urine
Selenium is an essential trace mineral that plays a critical role in immune system functioning and acts as a powerful antioxidant. This test measures selenium levels over a 24-hour period to assess whether deficiency or excess of this important nutrient could be impacting immune function. Abnormal selenium levels may be linked to various immune system disorders and can help guide nutritional interventions to support optimal immune health.
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The Role of Blood Testing in Immune Health
Blood tests play a crucial supporting role in evaluating immune system health by measuring various markers, including essential nutrients that are vital for proper immune function. These tests help healthcare providers understand potential underlying factors that may be contributing to immune dysfunction and guide appropriate treatment strategies.
Understanding Your Results
Test results should always be interpreted by a qualified healthcare provider who can consider your complete medical history, symptoms, and other diagnostic findings. Abnormal selenium levels may indicate the need for dietary adjustments or supplementation as part of a comprehensive approach to supporting immune system health.
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 immune system disorders.
