What does "Vitamin B12" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.
Vitamin B12 is a nutrient that the body needs to keep its nerve and blood cells healthy. It also helps make DNA, the genetic material in all cells. Vitamin B12 also prevents a type of anemia called megaloblastic anemia that makes people tired and weak. It is found in a variety of foods including meat, fish, and dairy products.
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