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Immunology & Autoimmune
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Currently under review
Pending specialist review and validation.
The total protein test measures the combined amount of proteins in your blood, mainly albumin and groups of proteins called globulins. These proteins help maintain fluid balance, carry hormones and nutrients, support immunity, and serve as building blocks for tissues.
Your result gives a broad view of your body’s protein status. It is often interpreted together with other tests, such as albumin and sometimes protein electrophoresis, to understand whether changes are due to hydration, nutrition, inflammation, liver function, kidney losses, or other conditions.
Doctors use total protein to help evaluate liver and kidney function, nutritional status, and inflammation. It can be ordered when you have symptoms like swelling, fatigue, unexpected weight change, or when there is concern for chronic illness. It is also a common part of routine chemistry panels and may be used to monitor known conditions over time.
Higher values can reflect reduced plasma water from dehydration or increased globulins from ongoing inflammation or certain blood disorders. Lower values can reflect decreased production, increased loss, or inadequate intake. Understanding the pattern helps your care team decide if more specific testing is needed.
A single total protein result is best understood in context. If it is higher than expected, your clinician may consider hydration status, recent illnesses, or conditions that increase antibody proteins, and may pair this with tests like albumin or protein electrophoresis when appropriate. If it is lower than expected, they may look for signs of liver synthesis issues, kidney or intestinal protein loss, or nutrition concerns.
If your result is outside the expected range, do not be alarmed. Many temporary factors can affect proteins, including recent illness and fluids. Your clinician may repeat the test, review medicines and hydration, and order follow‑up tests to pinpoint the cause and guide treatment.
Reference intervals vary by laboratory, analyzer, methodology, population, and units. The ranges shown here are for education only. Always interpret your results against the reference interval printed on your own lab report.
Dehydration concentrates proteins and can make results appear higher, while recent intravenous fluids or overhydration can dilute proteins and lower results. Tell your provider about recent fluid intake or IV treatments.
Standing for a long time before the draw or prolonged tourniquet use can concentrate blood proteins. Standardized blood collection reduces this pre‑analytic variation.
Corticosteroids, androgens, estrogens, and intravenous immunoglobulin can change protein levels. Monoclonal antibody therapies may increase measured globulins. Provide an up‑to‑date medication list.
Acute or chronic inflammation can raise certain globulins, shifting total protein upward. Recent infections or autoimmune activity may influence results even if you feel well.
Liver disease can reduce protein production, while kidney or intestinal disorders can increase protein loss. Your clinician may pair this test with albumin, creatinine, and urinalysis to clarify the picture.
Normal protein levels vary by age and can be lower during pregnancy. Inadequate protein intake or malabsorption may lower results, especially in older adults or those with chronic illness.
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