A Protein test measures the total amount of proteins in your blood, mainly albumin and globulin. These proteins play essential roles in building and repairing tissues, supporting immune function, and maintaining fluid balance in the body. Abnormal protein levels may indicate conditions such as liver disease, kidney disorders, infection, malnutrition, or chronic inflammation. Doctors commonly recommend this test when symptoms like swelling, fatigue, weakness, or unexplained weight changes are present.

For the Protein test, a small blood sample is collected from a vein, and in most cases no fasting is required, unless part of a larger panel. The results help evaluate your overall nutritional status and detect health issues affecting the liver, kidneys, or immune system. This test is often performed along with the Albumin/Globulin ratio (A/G ratio) and other liver or kidney function tests for accurate diagnosis.