- Vitamin B-12 - Mayo Clinic
Healthcare professionals might prescribe vitamin B-12 injectio ns or nasal spray to treat people with very low vitamin B-12 levels Having seriously low vitamin B-12 levels, called vitamin B-12 deficiency, isn’t common in the U S People who follow a vegetarian or vegan diet can sometimes have low levels
- Office of Dietary Supplements - Vitamin B12
Vitamin B12 overview for health professionals Research health effects, dosing, sources, deficiency symptoms, side effects, and interactions here
- Vitamin B12: Overview, Uses, Side Effects, Precautions . . .
Learn more about Vitamin B12 uses, effectiveness, possible side effects, interactions, dosage, user ratings and products that contain Vitamin B12
|