Below is an instruction from Human. Write a response.
    ### Instruction:
    How to prevent Pernicious Anemia ?
    ### Response:
    You can't prevent pernicious anemia caused by a lack of intrinsic factor. Without intrinsic factor, you won't be able to absorb vitamin B12 and will develop pernicious anemia.
                
Although uncommon, some people develop pernicious anemia because they don't get enough vitamin B12 in their diets.
    