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What an elevated serum B12 represents, and why no single threshold exists A serum B12 reflects vitamin bound to transport proteins in the blood, not the amount that has reached the tissues, and the threshold for calling it high shifts with the assay, the laboratory, reference interval, and the unit on the report
These pens use pharmaceutical-grade formulations with buffering agents, stabilizers, and preservatives beyond what standard bacteriostatic water reconstitution provides
Acta Orthop Scand 71:316321 Ethics declarations Conflict of interest The authors declare that they have no conflict of interest
The fillers usually contain lidocaine, a numbing agent, to help reduce pain during the injection process
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