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Freezing a mixed multi-use vial can create solution changes and freeze-thaw stress that are not worth accepting unless a protocol specifically requires aliquoted frozen storage
Take a B12 supplement for targeted health needs, such as a known deficiency, a vegan/vegetarian diet, neuropathy or other nervous system issues, or the formation of red blood cells
If the solution shows any signs of degradation (cloudiness, precipitate, colour change), discard
Every standard dose from 2.5mg through 10mg fits within a single 1 ml syringe
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