What is the most effective way to take B12?

[schneiderellie]

My doctor adviced me to take B12 supplements,, What are the best way to take it.

 

[Emma Louise]

Vitamin B12 can treat and prevent vitamin B12 deficiency. It can be taken by mouth, as a shot, or inhaled through the nose. The shot works best in people with severe vitamin B12 deficiency and in those not able to take vitamin B12 by mouth.