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The best option depends on your symptoms, lab results, and overall health
Pale or Jaundiced Skin A lack of B12 can interfere with the production of healthy red blood cells and may cause the skin to look pale
Analytically, a co-formulated vial also demands more of its certificate of analysis, which must resolve and assay two species of very different mass separately rather than reporting one aggregate figure
How Soon Do You Feel Less Tired After a B12 Injection
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