Alpha-1 antitrypsin replacement therapy is a medical treatment designed for individuals with alpha-1 antitrypsin deficiency, a genetic condition that can lead to lung and liver diseases. This therapy involves administering a purified form of the alpha-1 antitrypsin protein, which helps protect the lungs from damage caused by enzymes like elastase. The treatment is typically given through intravenous infusions and aims to restore normal levels of the protein in the bloodstream. By doing so, it can help reduce the risk of lung damage and improve overall lung function in affected individuals, enhancing their quality of life.