PROVIDER INITIATED TEST - The Selenium, Packed RBC test measures the level of selenium within red blood cells, providing insight into long-term or intracellular selenium status. Selenium is an essential trace mineral involved in antioxidant defense, thyroid hormone metabolism, and immune system function.
Because selenium stored inside red blood cells reflects longer-term status better than serum levels, this test is commonly used to evaluate nutritional selenium balance, particularly in individuals with suspected deficiency, thyroid disorders, or increased oxidative stress. Results are often interpreted alongside other trace mineral or thyroid-related tests.
Selenium, Packed RBC
PROVIDER INITIATED TEST - The Selenium, Packed RBC test measures the level of selenium within red blood cells, providing insight into long-term or intracellular selenium status. Selenium is an essential trace mineral involved in antioxidant defense, thyroid hormone metabolism, and immune system function.
Because selenium stored inside red blood cells reflects longer-term status better than serum levels, this test is commonly used to evaluate nutritional selenium balance, particularly in individuals with suspected deficiency, thyroid disorders, or increased oxidative stress. Results are often interpreted alongside other trace mineral or thyroid-related tests.
