Albumin Blood Test: MedlinePlus Medical Test

What is an Albumin Blood Test?

An albumin blood test measures the amount of albumin in your blood. Low albumin levels can be a sign of liver or kidney disease or another medical condition. High levels may be a sign of dehydration.

Albumin is a protein made by your liver. Albumin enters your bloodstream and helps keep fluid from leaking out of your blood vessels into other tissues. It is also carries hormones, vitamins, and enzymes throughout your body. Without enough albumin, fluid can leak out of your blood and build up in your lungs, abdomen (belly), or other parts of your body.

Other names: ALB, serum albumin test