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Expected duration of vitamin B 12 deficiency With proper treatment, symptoms of vitamin B 12 deficiency begin to improve within a few days
This is useful in some cases
A simple blood test can provide answers and determine if a B12 deficiency is the cause
Beyond the rare conditions above, a few groups should have a detailed conversation with a provider before starting
In the short term, some individuals may experience a quick boost in energy and improved mood shortly after receiving the injection, often within a few days
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