If you enjoy them, clams and oysters are excellent sources of vitamin B12, delivering 17 mcg and 14.9 mcg per serving, ...
If you're a vegan or vegetarian and don't eat meat, seafood, or dairy products, you may have been told by your general practitioner to monitor your vitamin B12 levels. These types of foods are great ...
Medically reviewed by Melissa Nieves, LND Key Takeaways Methylcobalamin is a natural form of vitamin B12 found in foods like meat and eggs.  Cyanocobalamin is a synthetic form of B12 often used in ...