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For others, it may take a week or two to notice significant improvements

Anaphylactic shock and death have been reported with administration of parenteral vitamin B12 (see WARNINGS)

Because Vitamin B12 has a unique role in the production and regeneration of cells, this means that its important to have healthy levels of this vitamin to have healthy skin, hair and nails

Vitamin B12 and menstruation are particularly important because of a type of anemia called pernicious anemia, or Biermer's disease

Here's something the internet won't tell you when it sells you research-grade powder: with an unregulated compound, what's in the bottle matters as much as the molecule itself