Serum or plasma mass concentration of human serum albumin (HSA) via mass spectrometry

What Albumin Does in Your Body

Albumin is a key protein in your blood that helps distribute nutrients, maintain fluid balance, and transport hormones and medications. It also contributes to your blood’s ability to clot and supports immune function. Low levels can signal conditions like kidney disease, liver problems, or severe dehydration, while high levels may be seen in conditions like dehydration or certain inflammatory states.

Why This Test Might Be Ordered

Your healthcare provider may order this test to check for kidney function, monitor chronic diseases (like liver disease or heart failure), assess nutritional status, or evaluate symptoms such as swelling, fatigue, or unexplained weight changes.

Common Reasons for Testing

Common reasons include diagnosing or monitoring kidney disease, liver disease, malnutrition, or fluid imbalances. It may also be used in patients with chronic conditions like heart failure or diabetes to track how well your body is retaining or losing albumin.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it involves a blood draw. Wear loose clothing for easy access to your arm.