Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Niemann-Pick Disease ?
    ### Response:
    Niemann-Pick disease (NP) refers to a group of inherited metabolic disorders known as lipid storage diseases. Lipids (fatty materials such as waxes, fatty acids, oils, and cholesterol) and proteins are usually broken down into smaller components to provide energy for the body.
    