Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Gilbert syndrome ?
    ### Response:
    Gilbert syndrome is a common, mild liver disorder in which the liver doesn't properly process bilirubin, a substance produced by the breakdown of red blood cells. Gilbert syndrome typically doesn't require treatment or pose serious complications. In fact, Gilbert syndrome is usually not considered a disease because of its benign nature.
    