Vitamin B12 does also accumulate in a few plant-based sources, including some mushrooms, seaweed, and nutritional yeast, but ...

A prescription form of vitamin B12 can be given as an injection, notes the NIH—typically for people with deficiencies who also have problems absorbing vitamin B12 as well as those who have ...

Supplements and injections are effective ways to treat ... Some energy drinks use vitamin B12 to give you a pep in your step. However, they only work well if you have a vitamin B-12 deficiency.