The Alpha-1-Antitrypsin (AAT) Test is a diagnostic test used to measure the amount of AAT protein in the blood. AAT is produced by the liver and plays a crucial role in protecting the lungs from damage caused by inflammation and enzyme activity. Low levels of AAT may indicate Alpha-1 Antitrypsin Deficiency, a genetic disorder that increases the risk of developing chronic obstructive pulmonary disease (COPD), emphysema, and liver diseases such as cirrhosis or hepatitis. This test is commonly recommended for individuals with unexplained respiratory symptoms, family history of AAT deficiency, or liver-related issues. Early detection allows for better management and preventive care, reducing the risk of severe complications.