How should I supplement my diet with vitamin b12?

M L · Yahoo User

I am a partial vegetarian. I only eat seafood, no red meat or poultry. I do eat dairy products as well. After watching a show dealing with b12 deficiencies, I think I may have that problem. Before going to the doctor which I cannot afford I would like to try to supplement my diet with b12 to see if that helps. I do not want to overdose on b12 so how should I do this? Should I do vitamin pills or addition to my diet?