For hepatitis B patients, selenium supplementation has no therapeutic effect, but may have some secondary effects. Hepatitis B is a familiar liver disease caused by infection of the body by the hepatitis B virus. Although selenium supplementation cannot directly treat hepatitis B, selenium supplementation can replenish the selenium needed by the body, and selenium can protect the liver, as selenium deficiency is common among people suffering from hepatitis B. Therefore, selenium supplementation can actually assist in the treatment of hepatitis B and promote the body’s recovery. Although there is no research on whether selenium supplementation has a therapeutic effect on hepatitis B, for patients with hepatitis B who are already deficient in selenium, the benefits of selenium supplementation should not be ignored, so patients can follow the doctor’s instructions for appropriate selenium supplementation, but be careful to avoid excessive selenium supplementation.