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They will perform a blood test to measure your vitamin B12 levels and determine if you are deficient
That process is slow, and for some people it is not very efficient
Professional providers carefully evaluate: Your health history Current vitamin levels Appropriate dosage Frequency of treatment the benefits of B12 without the risk of overdose
The body then uses vitamin B12 for various functions, In a person with pernicious anemia, the immune system mistakenly attacks the cells that produce the intrinsic factor
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