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They look at serum B12 levels, complete blood count (CBC), and neurological function markers
If blood tests show clearly low levels (thresholds vary by lab, but often below roughly 200 pg/mL) or there are signs of anemia, a provider may recommend weekly injections for the first several weeks as a correction or "rescue" phase
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Always clean the rubber stopper with an alcohol prep pad before each use and dispose of syringes properly in a sharps container
Are B12 injections painful
B12 Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism
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