Patients with type 1 diabetes can choose to undergo genetic testing at a hospital that conducts genetic testing or some formal institutions that specialize in genetic testing. Genetic testing is a technology that can detect DNA through blood or other body fluids, analyze gene defects and gene types as well as whether their expression functions are normal or not, and can be used to diagnose diseases as well as predict the risk of diseases, and can also be used to select suitable therapeutic drugs through genetic diagnosis. Patients with type 1 diabetes who need genetic testing can choose to undergo genetic testing in a hospital that conducts genetic testing or in some formal institutions that specialize in genetic testing. It is recommended to find a formal organization or hospital, and also under the guidance of a doctor.