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Using a vial beyond 28 days means injecting a solution with unknown potency and potentially elevated bacterial contamination
Sublingual forms dissolve under the tongue, with the idea that some B12 enters through the mouth's membranes instead of the digestive tract
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B12 can also be taken as a sublingual tablet, and this is a suitable choice for anyone that doesn't want to get an injection and purchase vitamin B12 without a prescription
For traceability, label all aliquots with compound name, concentration, reconstitution date, and operator initials
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