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Our amber glass vials block 66% of light, but foil provides full protection
In that case, injections are not appropriate
High dose oral cobalamin may be a suitable alternative in selective cases, where intramuscular injections are not tolerated and compliance is not a problem
High oral bioavailability and membrane permeability ensure effective systemic distribution without complex preparation requirements
[10] Subcutaneous injections are relatively quick (done in a few minutes) and can be administered in a doctors office or self-administered at home if the patient is comfortable with it
doi:10.1177/15648265100311S104
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