Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) hereditary fructose intolerance ?
    ### Response:
    Hereditary fructose intolerance is a condition that affects a person's ability to digest the sugar fructose. Fructose is a simple sugar found primarily in fruits. Affected individuals develop signs and symptoms of the disorder in infancy when fruits, juices, or other foods containing fructose are introduced into the diet.
    