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Administration: Intramuscular or subcutaneous injection
Response to treatment and monitoring : Most patients notice improvement in fatigue within days to weeks of starting treatment, though neurological symptoms may take several months to resolve and may not fully reverse if long-standing
How to Get Vitamin B12 Making sure you get the right amount of vitamin B12 depends on things such as your age, eating habits, health conditions, and the medications you take
Virtanen, P
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