B12 is a vitamin that is essential for good health. It is important for red blood cell production, functioning of the nervous system and for mental processes. A deficiency of B12 in your body could lead to a number of problems. However, a deficiency of the vitamin can be met with supplements that are available over the counter. When buying a B12 supplement, keep the below-mentioned things in mind. Buy a supplement, not a processed food You will come across many fortified foods that claim that they contain vitamin B12 on the label. However, do not simply pick it up