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The trials tested oral, intravenous, and subcutaneous routes of administration at doses ranging from micrograms to 1 mg per day

Patients should be monitored during and for at least 30 minutes after administration

This is probably explained by the fact that S-adenosylmethionine (SAM), which is important for many epigenetic processes, is regenerated by methylcobalamin, whereas cyanocobalamin reduces it (as we explored above)

The traditional approach has been: But more recent evidence and updated practices across UK hospitals show that oral B12 works for many patients , if taken in the right dose and form

That means precise documentation, controlled storage, and clear separation between research use and anything outside that scope