Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose MTHFR gene mutation ?
    ### Response:
    Is genetic testing available to detect MTHFR gene mutations? Yes. Genetic testing is available for MTHFR gene mutations. This testing can be used in people with suspected homocystinuria or to determine the cause of elevated homocysteine levels in the blood.
    