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Adults need around 2.4 micrograms (mcg) of vitamin B12 a day

If Methylcobalamin is left out of the fridge after being mixed it will not damage the medication

This deficiency can cause serious health issues like fatigue, neurological problems, and blood problems

The reported adverse reactions following parenteral administration of vitamin B12 include: Generalized : Anaphylaxis and death Cardiovascular : Pulmonary edema and congestive cardiac/heart failure during early treatment

For others, it may take 23 days, especially if they were significantly deficient

Deficiency is common, especially in people who follow a vegetarian or vegan diet