injection b12 expiration Hi I bought the injectable liquid but there's no use by date on it or how long you have to use it once it's opened. Anyone know the answer? TIA x B12 vitamin Store Vitamin B12
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Recently a method has been developed and validated in which MMA/creatinine can be assayed in fasting urine samples collected on filter paper

doi: 10.1001/jama.2009.2014

In those cases the unit math changes a 0.25 mg dose at 3 mg/ml is about 8 units, not 25

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