Albumin Blood Test

Albumin is a protein made mainly by the liver. An albumin blood test measures the concentration of albumin in a blood sample.

Albumin is commonly included in a comprehensive metabolic or liver-related evaluation. Clinicians interpret the albumin level with your symptoms, medical history, and other test results rather than using it alone.

Clinicians may order an albumin blood test when assessing possible liver or kidney disease, swelling, fluid imbalance, malnutrition, or unexplained changes in health. A low albumin or albumin low result can be one finding that prompts further evaluation, but it does not identify a cause by itself.

Monitoring existing conditions

The test may also monitor a known liver or kidney condition, support care during hospitalization, or follow up on an abnormal laboratory result. Albumin testing is often part of a broader blood panel or risk-based evaluation, rather than a stand-alone screening test for people without a clinical reason.

Many albumin blood tests require no special preparation. Follow the instructions from the ordering clinician or laboratory, because other tests collected at the same appointment may require fasting or other preparation. The report will include the laboratory’s reference range used to assess normal albumin levels.

An albumin blood test is a single-session venous blood draw. A healthcare professional cleans the skin, inserts a needle into a vein, collects blood into one or more tubes, and removes the needle.

Collection usually takes only a few minutes. Afterward, the clinician applies pressure or a small bandage to the puncture site, and you can generally resume normal activities unless other testing or medical instructions say otherwise.

Results are usually reported as a numeric albumin concentration with a laboratory-specific reference range. Use the range printed on your report rather than applying a universal cutoff, because normal albumin levels can vary by laboratory and testing method.

What low or high results may mean

Low albumin, sometimes described as albumin low, may be associated with liver disease, protein loss through the kidneys, inflammation, poor nutrition, or other conditions. Albumin high or high albumin results can occur with dehydration or other health changes. These possibilities do not make an albumin level a diagnosis.

Clinicians may interpret the result alongside a globulin blood test, the albumin/globulin ratio, a total protein blood test, liver and kidney tests, symptoms, and medical history. Depending on the findings, they may recommend repeat testing or additional evaluation.