Depends: If you are talking about iron deficiency anemia, this can happen suddently (like rectal bleeding or major injury) or over time (months, years). All depends on the cause. Things like B12 deficiency may take as much as 5 years to occur.
Answered 6/24/2014
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3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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