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researchers typically prepare single-use aliquots prior to reconstitution
Firstly a few principles
You need a prescription, even though B12 is very safe to inject and you cant overdose
The body excretes excess B12 through the kidneys, and no Tolerable Upper Intake Level exists because B12 toxicity from dietary sources is extremely rare
10.1016/0928-4257(93)90038-u 114 SikiricP.RucmanR.TurkovicB.SeverM.KlicekR.RadicB.et al (2018)
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