Enzyme replacement therapy (ERT) is a medical treatment designed to provide patients with specific enzymes that their bodies cannot produce adequately. This therapy is commonly used for genetic disorders, such as Gaucher disease and Fabry disease, where the lack of certain enzymes leads to harmful substance accumulation in the body. During ERT, patients receive infusions of the missing enzyme, which helps to restore normal function and reduce symptoms. The treatment can improve quality of life and prevent complications associated with these disorders. ERT is typically administered regularly, and its effectiveness may vary among individuals.