Prealbumin is a liver-made blood protein. Its level can change with illness and inflammation, so it is not a stand-alone nutrition test.
Prealbumin is a protein made by the liver and found in blood. A prealbumin blood test has been used as part of nutritional assessment, especially in people who are seriously ill or in hospital.
Inflammation, infection, injury, liver disease, and other conditions can lower prealbumin. Many experts do not recommend using prealbumin alone to diagnose or monitor malnutrition, which means not getting or using enough nutrients. An abnormal result may need to be considered with other tests and the person’s overall health.

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