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The specific shade you see depends on several factors: the concentration of B12 in your formulation, which form of B12 the pharmacy used, the total volume of solution in the vial, and how the medication has been stored since it left the compounding facility

If you're on serious prescription drugs, verify with your healthcare provider

An alarming or concerning B12 level is below 200 picograms per milliliter (pg/mL)

What to test alongside ferritin: a single ferritin value can mislead

In order for this interaction to make sense, a brief description of the normal sequence of events for vitamin B12 absorption must be understood