The **Alpha-1 Antitrypsin (AAT) Diagnostic Test** is a crucial blood analysis used to measure the levels of AAT, a protective protein synthesized by the liver. AAT plays a vital role in safeguarding lung tissue from being damaged by its own inflammatory enzymes.

A deficiency in this protein, typically caused by a genetic mutation, leaves the lungs highly vulnerable, often leading to early-onset emphysema or chronic obstructive pulmonary disease (COPD). The test is essential for individuals exhibiting unexplained respiratory symptoms or signs of liver disease, enabling early diagnosis, lifestyle adjustments, and targeted therapies like augmentation treatment.