The right B12 choice usually becomes clearer when symptoms, labs, diet, and prior response are reviewed together instead of judged by one blood value
0.25mg dose: Draw to 7.5 units (round to 7 or 8) 0.5mg dose: Draw to 15 units 1.0mg dose: Draw to 30 units 1.7mg dose: Draw to 51 units 2.0mg dose: Draw to 60 units 2.4mg dose: Draw to 72 units These unit measurements are easier to read on a standard insulin syringe, which is why the 3mL reconstitution has become the default recommendation across most research communities
People with dietary restrictions, such as vegans and vegetarians, who may not get sufficient B12 from their diet, or those with absorption issues, like those with pernicious anemia or gastrointestinal disorders, also often qualify
The Journey of a Fresher Nurse in the ED Ready, Steady, Go